diff --git a/profiles/color.org/Upper_Left.icc.txt b/profiles/color.org/Upper_Left.icc.txt
index bdadebe..da07519 100644
--- a/profiles/color.org/Upper_Left.icc.txt
+++ b/profiles/color.org/Upper_Left.icc.txt
@@ -20,11 +20,11 @@
  A2B : "M", Matrix, "B"
  "M" : 3 inputs
   M0 : 16-bit table with 256 entries
-  ~= : 3.278764, 0.6213684, 0.2607365, 1.412451, 0.003921569, -0.006866455, 0 (Max error: 0.367269) (D-gap: 0.000154649) (f(1) = 0.65572)
+  ~= : 2.034415, 1, -6.80238e-06, 1.290439, 0.05490196, 0.06838989, 0 (Max error: 0.162423) (D-gap: 0.000268772) (f(1) = 1.06838)
   M1 : 16-bit table with 256 entries
-  ~= : 3.278764, 0.6213684, 0.2607365, 1.412451, 0.003921569, -0.006866455, 0 (Max error: 0.367269) (D-gap: 0.000154649) (f(1) = 0.65572)
+  ~= : 2.034415, 1, -6.80238e-06, 1.290439, 0.05490196, 0.06838989, 0 (Max error: 0.162423) (D-gap: 0.000268772) (f(1) = 1.06838)
   M2 : 16-bit table with 256 entries
-  ~= : 3.278764, 0.6213684, 0.2607365, 1.412451, 0.003921569, -0.006866455, 0 (Max error: 0.367269) (D-gap: 0.000154649) (f(1) = 0.65572)
+  ~= : 2.034415, 1, -6.80238e-06, 1.290439, 0.05490196, 0.06838989, 0 (Max error: 0.162423) (D-gap: 0.000268772) (f(1) = 1.06838)
 Mtrx : | 0.959396958 0.84733814 0.314814538 -0.503105104 |
        | 0.489433438 1.57752109 0.133390293 -0.521812081 |
        | 0.0305781476 0.213589266 1.57086837 -0.430443883 |
diff --git a/profiles/color.org/Upper_Right.icc.txt b/profiles/color.org/Upper_Right.icc.txt
index 3005af2..1e74a0c 100644
--- a/profiles/color.org/Upper_Right.icc.txt
+++ b/profiles/color.org/Upper_Right.icc.txt
@@ -22,11 +22,11 @@
 CLUT : 2 x 2 x 2 (16 bpp)
  "M" : 3 inputs
   M0 : 16-bit table with 256 entries
-  ~= : 5.635474, 0.536911, 0.3392392, 0.9400777, 0.05882353, 0.05212021, 0 (Max error: 0.362454) (D-gap: 0.000554256) (f(1) = 0.52655)
+  ~= : 2.470196, 1, -9.961426e-06, 0.9400777, 0.05882353, 0.05463409, 0 (Max error: 0.168172) (D-gap: 0.000247952) (f(1) = 1.05461)
   M1 : 16-bit table with 256 entries
-  ~= : 5.635474, 0.536911, 0.3392392, 0.9400777, 0.05882353, 0.05212021, 0 (Max error: 0.362454) (D-gap: 0.000554256) (f(1) = 0.52655)
+  ~= : 2.470196, 1, -9.961426e-06, 0.9400777, 0.05882353, 0.05463409, 0 (Max error: 0.168172) (D-gap: 0.000247952) (f(1) = 1.05461)
   M2 : 16-bit table with 256 entries
-  ~= : 5.635474, 0.536911, 0.3392392, 0.9400777, 0.05882353, 0.05212021, 0 (Max error: 0.362454) (D-gap: 0.000554256) (f(1) = 0.52655)
+  ~= : 2.470196, 1, -9.961426e-06, 0.9400777, 0.05882353, 0.05463409, 0 (Max error: 0.168172) (D-gap: 0.000247952) (f(1) = 1.05461)
 Mtrx : | 2.20205379 1.94485557 0.72255367 -0.733356714 |
        | 1.12339592 3.6207943 0.306147665 -0.760608494 |
        | 0.0701893568 0.490257412 3.60553575 -0.62743181 |
diff --git a/profiles/fuzz/fit_pq.icc.txt b/profiles/fuzz/fit_pq.icc.txt
index 93a0b93..776fd54 100644
--- a/profiles/fuzz/fit_pq.icc.txt
+++ b/profiles/fuzz/fit_pq.icc.txt
@@ -8,8 +8,14 @@
  'kTRC' : 'curv' :    110 : 32
 
 rTRC : 16-bit table with 5 entries
+  ~= : 1, 1, 7.629395e-06, 0.003997864, 0.5, -0.4979935, 0 (Max error: 0.745052) (D-gap: 1.52283e-05) (f(1) = 0.502007)
 gTRC : 16-bit table with 5 entries
+  ~= : 1, 1, 7.629395e-06, 0.003997864, 0.5, -0.4979935, 0 (Max error: 0.745052) (D-gap: 1.52283e-05) (f(1) = 0.502007)
 bTRC : 16-bit table with 5 entries
+  ~= : 1, 1, 7.629395e-06, 0.003997864, 0.5, -0.4979935, 0 (Max error: 0.745052) (D-gap: 1.52283e-05) (f(1) = 0.502007)
+Best : 1, 1, 7.629395e-06, 0.003997864, 0.5, -0.4979935, 0 (D-gap: 1.52283e-05) (f(1) = 0.502007)
+Inv  : 1, 1, 0.4979935, 250.1336, 0.001998932, 0, -0 (D-gap: -1.90735e-06) (f(1) = 1.49799)
+Best Error: | 0.745052 0.745052 0.745052 |
  XYZ : | 0.95799255 0 0 |
        | 0 1.0027313 0 |
        | 0 0 0.81640625 |
diff --git a/profiles/fuzz/inf_a.icc.txt b/profiles/fuzz/inf_a.icc.txt
index cd86e3a..fcdfc95 100644
--- a/profiles/fuzz/inf_a.icc.txt
+++ b/profiles/fuzz/inf_a.icc.txt
@@ -12,14 +12,14 @@
  'kTRC' : 'curv' :    544 : 388
 
 rTRC : 16-bit table with 257 entries
-  ~= : 0.03983583, 0.1516733, -0.0005732282, 0.1250019, 0.00390625, -0.6482544, 0 (Max error: 1.84306e+06) (D-gap: 0.000110619) (f(1) = 0.27919)
+  ~= : 0.07488938, 0.007860422, -3.070464e-05, 0.1250019, 0.00390625, -0.1817474, 0 (Max error: 1181.7) (D-gap: 5.7213e-05) (f(1) = 0.513702)
 gTRC : 16-bit table with 257 entries
-  ~= : 0.03983583, 0.1516733, -0.0005732282, 0.1250019, 0.00390625, -0.6482544, 0 (Max error: 1.84306e+06) (D-gap: 0.000110619) (f(1) = 0.27919)
+  ~= : 0.07488938, 0.007860422, -3.070464e-05, 0.1250019, 0.00390625, -0.1817474, 0 (Max error: 1181.7) (D-gap: 5.7213e-05) (f(1) = 0.513702)
 bTRC : 16-bit table with 257 entries
-  ~= : 0.03983583, 0.1516733, -0.0005732282, 0.1250019, 0.00390625, -0.6482544, 0 (Max error: 1.84306e+06) (D-gap: 0.000110619) (f(1) = 0.27919)
-Best : 0.03983583, 0.1516733, -0.0005732282, 0.1250019, 0.00390625, -0.6482544, 0 (D-gap: 0.000110619) (f(1) = 0.27919)
-Inv  : 25.10303, 1.07798, 0.6988053, 7.999878, 0.0004882887, 0.005870819, -0 (D-gap: 0.00209078) (f(1) = 1.84306e+06)
-Best Error: | 1.84306e+06 1.84306e+06 1.84306e+06 |
+  ~= : 0.07488938, 0.007860422, -3.070464e-05, 0.1250019, 0.00390625, -0.1817474, 0 (Max error: 1181.7) (D-gap: 5.7213e-05) (f(1) = 0.513702)
+Best : 0.07488938, 0.007860422, -3.070464e-05, 0.1250019, 0.00390625, -0.1817474, 0 (D-gap: 5.7213e-05) (f(1) = 0.513702)
+Inv  : 13.35303, 1.437515, 0.2612647, 7.999878, 0.0004882887, 0.003726959, -0 (D-gap: -0.000179274) (f(1) = 1181.82)
+Best Error: | 1181.7 1181.7 1181.7 |
  XYZ : | 0.9614258 0 0 |
        | 0 1.0004883 0 |
        | 0 0 0.82470703 |
diff --git a/profiles/fuzz/inverse_tf_adb_negative.icc.txt b/profiles/fuzz/inverse_tf_adb_negative.icc.txt
index 08a3352..47f6b50 100644
--- a/profiles/fuzz/inverse_tf_adb_negative.icc.txt
+++ b/profiles/fuzz/inverse_tf_adb_negative.icc.txt
@@ -18,8 +18,11 @@
  'gTRC' : 'curv' :   2080 : 508
 
 rTRC : 16-bit table with 1024 entries
+  ~= : 11.04649, 1, -0.0009775171, 0.4995193, 0.0009775171, 0.0003890991, 0 (Max error: 1) (D-gap: -9.91896e-05) (f(1) = 0.989616)
 gTRC : 16-bit table with 1024 entries
+  ~= : 11.04649, 1, -0.0009775171, 0.4995193, 0.0009775171, 0.0003890991, 0 (Max error: 1) (D-gap: -9.91896e-05) (f(1) = 0.989616)
 bTRC : 16-bit table with 1024 entries
+  ~= : 11.04649, 1, -0.0009775171, 0.4995193, 0.0009775171, 0.0003890991, 0 (Max error: 1) (D-gap: -9.91896e-05) (f(1) = 0.989616)
  XYZ : | 8224.125 8224.125 8224.125 |
        | 8224.125 8224.125 8224.125 |
        | -0.0034179688 8224.125 8224.125 |
diff --git a/profiles/fuzz/inverse_tf_huge_g.icc.txt b/profiles/fuzz/inverse_tf_huge_g.icc.txt
index 88ea7fe..162d8be 100644
--- a/profiles/fuzz/inverse_tf_huge_g.icc.txt
+++ b/profiles/fuzz/inverse_tf_huge_g.icc.txt
@@ -10,8 +10,14 @@
  'kTRC' : 'curv' :    244 : 212
 
 rTRC : 16-bit table with 43 entries
+  ~= : 2.985061, 1, -1.594611e-05, 41.95129, 0.02380952, 0.9988265, 0 (Max error: 0.97938) (D-gap: 4.17233e-07) (f(1) = 1.99879)
 gTRC : 16-bit table with 43 entries
+  ~= : 2.985061, 1, -1.594611e-05, 41.95129, 0.02380952, 0.9988265, 0 (Max error: 0.97938) (D-gap: 4.17233e-07) (f(1) = 1.99879)
 bTRC : 16-bit table with 43 entries
+  ~= : 2.985061, 1, -1.594611e-05, 41.95129, 0.02380952, 0.9988265, 0 (Max error: 0.97938) (D-gap: 4.17233e-07) (f(1) = 1.99879)
+Best : 2.985061, 1, -1.594611e-05, 41.95129, 0.02380952, 0.9988265, 0 (D-gap: 4.17233e-07) (f(1) = 1.99879)
+Inv  : 0.3350015, 1, -0.9988265, 0.02383717, 0.9988403, 3.814697e-06, -0 (D-gap: -0.000247927) (f(1) = 0.104296)
+Best Error: | 0.97938 0.97938 0.97938 |
  XYZ : | 0.9642029 0 0 |
        | 0 1 0 |
        | 0 0 0.8249054 |
diff --git a/profiles/fuzz/inverse_tf_not_invertible.icc.txt b/profiles/fuzz/inverse_tf_not_invertible.icc.txt
index 8dcd999..8f416d3 100644
--- a/profiles/fuzz/inverse_tf_not_invertible.icc.txt
+++ b/profiles/fuzz/inverse_tf_not_invertible.icc.txt
@@ -16,14 +16,14 @@
  'bTRC' : 'curv' :   8204 : 320
 
 rTRC : 16-bit table with 4096 entries
-  ~= : 3.239427, 0.7659531, 0.7326652, 0.07707816, 0.04078144, -0.4143219, 0 (Max error: 0.761265) (D-gap: 0.000436735) (f(1) = 3.29344)
+  ~= : 1.403709, 0.9121704, 0.2242268, 0.07707816, 0.04078144, -0.1487198, 0 (Max error: 0.662578) (D-gap: 0.00021739) (f(1) = 1.04768)
 gTRC : 16-bit table with 4096 entries
-  ~= : 3.239427, 0.7659531, 0.7326652, 0.07707816, 0.04078144, -0.4143219, 0 (Max error: 0.761265) (D-gap: 0.000436735) (f(1) = 3.29344)
+  ~= : 1.403709, 0.9121704, 0.2242268, 0.07707816, 0.04078144, -0.1487198, 0 (Max error: 0.662578) (D-gap: 0.00021739) (f(1) = 1.04768)
 bTRC : 16-bit table with 4096 entries
-  ~= : 3.239427, 0.7659531, 0.7326652, 0.07707816, 0.04078144, -0.4143219, 0 (Max error: 0.761265) (D-gap: 0.000436735) (f(1) = 3.29344)
-Best : 3.239427, 0.7659531, 0.7326652, 0.07707816, 0.04078144, -0.4143219, 0 (D-gap: 0.000436735) (f(1) = 3.29344)
-Inv  : 0.3086966, 2.37207, 0.9828007, 12.97384, 0.003143358, -0.9564362, -0 (D-gap: -0.00023884) (f(1) = 0.496567)
-Best Error: | 0.761265 0.761265 0.761265 |
+  ~= : 1.403709, 0.9121704, 0.2242268, 0.07707816, 0.04078144, -0.1487198, 0 (Max error: 0.662578) (D-gap: 0.00021739) (f(1) = 1.04768)
+Best : 1.403709, 0.9121704, 0.2242268, 0.07707816, 0.04078144, -0.1487198, 0 (D-gap: 0.00021739) (f(1) = 1.04768)
+Inv  : 0.7123984, 1.137833, 0.1692182, 12.97384, 0.003143358, -0.2457199, -0 (D-gap: -0.000215951) (f(1) = 0.964401)
+Best Error: | 0.662578 0.662578 0.662578 |
  XYZ : | 0.43606567 0.3850708 0.14305115 |
        | 0.22250366 0.71687317 0.06060791 |
        | 0.013916016 0.09706116 0.71398926 |
diff --git a/profiles/fuzz/nan_s.icc.txt b/profiles/fuzz/nan_s.icc.txt
index db820b1..a2e14b5 100644
--- a/profiles/fuzz/nan_s.icc.txt
+++ b/profiles/fuzz/nan_s.icc.txt
@@ -8,14 +8,14 @@
  'kTRC' : 'curv' :    528 : 48
 
 rTRC : 16-bit table with 258 entries
-  ~= : 0.2315896, 0.001808926, 0.0004575932, 206.8078, 0.00389105, 0.635603, 0 (Max error: 6.768) (D-gap: -2.68221e-06) (f(1) = 0.879673)
+  ~= : 2.025319, 1, 2.325047e-06, 206.8078, 0.00389105, 0.8047485, 0 (Max error: 0.999377) (D-gap: 6.19888e-05) (f(1) = 1.80476)
 gTRC : 16-bit table with 258 entries
-  ~= : 0.2315896, 0.001808926, 0.0004575932, 206.8078, 0.00389105, 0.635603, 0 (Max error: 6.768) (D-gap: -2.68221e-06) (f(1) = 0.879673)
+  ~= : 2.025319, 1, 2.325047e-06, 206.8078, 0.00389105, 0.8047485, 0 (Max error: 0.999377) (D-gap: 6.19888e-05) (f(1) = 1.80476)
 bTRC : 16-bit table with 258 entries
-  ~= : 0.2315896, 0.001808926, 0.0004575932, 206.8078, 0.00389105, 0.635603, 0 (Max error: 6.768) (D-gap: -2.68221e-06) (f(1) = 0.879673)
-Best : 0.2315896, 0.001808926, 0.0004575932, 206.8078, 0.00389105, 0.635603, 0 (D-gap: -2.68221e-06) (f(1) = 0.879673)
-Inv  : 4.317984, 4.316589, -2.743637, 0.004835406, 0.8046997, -0.2521896, -0 (D-gap: 0.000728548) (f(1) = 6.81654)
-Best Error: | 6.768 6.768 6.768 |
+  ~= : 2.025319, 1, 2.325047e-06, 206.8078, 0.00389105, 0.8047485, 0 (Max error: 0.999377) (D-gap: 6.19888e-05) (f(1) = 1.80476)
+Best : 2.025319, 1, 2.325047e-06, 206.8078, 0.00389105, 0.8047485, 0 (D-gap: 6.19888e-05) (f(1) = 1.80476)
+Inv  : 0.4937495, 1, -0.8046997, 0.004835406, 0.8046997, -3.051758e-05, -0 (D-gap: -0.00392157) (f(1) = 0.446409)
+Best Error: | 0.999377 0.999377 0.999377 |
  XYZ : | 0.95739746 0 0 |
        | 0 1.0083008 0 |
        | 0 0 0.8161621 |
diff --git a/profiles/fuzz/negative_a_when_inverted.icc.txt b/profiles/fuzz/negative_a_when_inverted.icc.txt
index 8c157bb..ec6f323 100644
--- a/profiles/fuzz/negative_a_when_inverted.icc.txt
+++ b/profiles/fuzz/negative_a_when_inverted.icc.txt
@@ -8,8 +8,14 @@
  'kTRC' : 'curv' :    102 : 32
 
 rTRC : 16-bit table with 41 entries
+  ~= : 3.471169, 1, -7.677823e-06, 10.00992, 0.05, 0.500597, 0 (Max error: 0.987463) (D-gap: 0.000131547) (f(1) = 1.50057)
 gTRC : 16-bit table with 41 entries
+  ~= : 3.471169, 1, -7.677823e-06, 10.00992, 0.05, 0.500597, 0 (Max error: 0.987463) (D-gap: 0.000131547) (f(1) = 1.50057)
 bTRC : 16-bit table with 41 entries
+  ~= : 3.471169, 1, -7.677823e-06, 10.00992, 0.05, 0.500597, 0 (Max error: 0.987463) (D-gap: 0.000131547) (f(1) = 1.50057)
+Best : 3.471169, 1, -7.677823e-06, 10.00992, 0.05, 0.500597, 0 (D-gap: 0.000131547) (f(1) = 1.50057)
+Inv  : 0.2880874, 1, -0.5004959, 0.09990092, 0.5004959, -2.288818e-05, -0 (D-gap: -0.0500229) (f(1) = 0.81871)
+Best Error: | 0.987463 0.987463 0.987463 |
  XYZ : | 0.95751953 0 0 |
        | 0 1.0004883 0 |
        | 0 0 0.82029724 |
diff --git a/profiles/fuzz/one_d_clut.icc.txt b/profiles/fuzz/one_d_clut.icc.txt
index ea2f08f..6842b1f 100644
--- a/profiles/fuzz/one_d_clut.icc.txt
+++ b/profiles/fuzz/one_d_clut.icc.txt
@@ -20,10 +20,11 @@
 CLUT : 2 (16 bpp)
  "M" : 3 inputs
   M0 : 16-bit table with 256 entries
+  ~= : 2.470196, 1, -9.961426e-06, 0.9400777, 0.05882353, 0.05463409, 0 (Max error: 0.235662) (D-gap: 0.000247952) (f(1) = 1.05461)
   M1 : 16-bit table with 256 entries
-  ~= : 2.556935, 0.8069916, 0.1048158, 1.058366, 0.003921569, 0.0008773804, 0 (Max error: 0.473545) (D-gap: 0.000101503) (f(1) = 0.790394)
+  ~= : 2.470196, 1, -9.961426e-06, 0.9400777, 0.05882353, 0.05463409, 0 (Max error: 0.388634) (D-gap: 0.000247952) (f(1) = 1.05461)
   M2 : 16-bit table with 256 entries
-  ~= : 2.512288, 0.9082756, 0.1125738, 1.058366, 0.003921569, -8.392334e-05, 0 (Max error: 0.194256) (D-gap: 0.00024071) (f(1) = 1.05297)
+  ~= : 2.470196, 1, -9.961426e-06, 0.9400777, 0.05882353, 0.05463409, 0 (Max error: 0.172776) (D-gap: 0.000247952) (f(1) = 1.05461)
 Mtrx : | 2.20205379 1.94485557 4.72249269 -0.733356714 |
        | 1.12339592 3.6207943 0.306147665 -0.760608494 |
        | 0.0701893568 0.490257412 3.60553575 -0.62743181 |
diff --git a/profiles/fuzz/polytf_nan_after_update.icc.txt b/profiles/fuzz/polytf_nan_after_update.icc.txt
index 69b2efe..686138b 100644
--- a/profiles/fuzz/polytf_nan_after_update.icc.txt
+++ b/profiles/fuzz/polytf_nan_after_update.icc.txt
@@ -17,9 +17,11 @@
  'bTRC' : 'curv' :    524 : 1592
 
 rTRC : 16-bit table with 256 entries
+  ~= : 3.045648, 1, -5.939649e-05, 32, 0.003921569, 0.1258659, 0 (Max error: 0.913669) (D-gap: 0.000375792) (f(1) = 1.12568)
 gTRC : 16-bit table with 256 entries
+  ~= : 3.045648, 1, -5.939649e-05, 32, 0.003921569, 0.1258659, 0 (Max error: 0.772618) (D-gap: 0.000375792) (f(1) = 1.12568)
 bTRC : 16-bit table with 256 entries
-  ~= : 0.0886098, 25.71094, -0.1004161, 254.1323, 0.003921569, 0.4954681, 0 (Max error: 0.996099) (D-gap: 7.62939e-06) (f(1) = 1.82837)
+  ~= : 3.045648, 1, 0.0003229971, 254.1323, 0.003921569, 0.9965984, 0 (Max error: 0.975963) (D-gap: 1.13249e-06) (f(1) = 1.99757)
  XYZ : | 8224.125 8224.125 8224.125 |
        | 8224.125 8224.125 8224.125 |
        | 8224.125 8224.125 8224.125 |
diff --git a/profiles/misc/BenQ_GL2450.icc.txt b/profiles/misc/BenQ_GL2450.icc.txt
index 5afe421..24d672f 100644
--- a/profiles/misc/BenQ_GL2450.icc.txt
+++ b/profiles/misc/BenQ_GL2450.icc.txt
@@ -21,14 +21,14 @@
  'bTRC' : 'curv' :   2060 : 4936
 
 rTRC : 16-bit table with 1024 entries
-  ~= : 1.999662, 0.9999352, 0.009358991, 0, 0, -0.0001144409, 0 (Max error: 0.0113029) (f(1) = 1.01849)
+  ~= : 1.993112, 1.001831, -0, 0, 0, -1.525879e-05, 0 (Max error: 0.00890554) (f(1) = 1.00362)
 gTRC : 16-bit table with 1024 entries
-  ~= : 1.999662, 0.9999352, 0.009358991, 0, 0, -0.0001144409, 0 (Max error: 0.0113029) (f(1) = 1.01849)
+  ~= : 1.993112, 1.001831, -0, 0, 0, -1.525879e-05, 0 (Max error: 0.00890554) (f(1) = 1.00362)
 bTRC : 16-bit table with 1024 entries
-  ~= : 1.999662, 0.9999352, 0.009358991, 0, 0, -0.0001144409, 0 (Max error: 0.0113029) (f(1) = 1.01849)
-Best : 1.999662, 0.9999352, 0.009358991, 0, 0, -0.0001144409, 0 (f(1) = 1.01849)
-Inv  : 0.5000845, 1.00013, 0.0001144558, 0, 0, -0.009284973, 0 (f(1) = 0.990837)
-Best Error: | 0.0113029 0.0113029 0.0113029 |
+  ~= : 1.993112, 1.001831, -0, 0, 0, -1.525879e-05, 0 (Max error: 0.00890554) (f(1) = 1.00362)
+Best : 1.993112, 1.001831, -0, 0, 0, -1.525879e-05, 0 (f(1) = 1.00362)
+Inv  : 0.5017281, 0.9963799, 1.520355e-05, 0, 0, -2.288818e-05, 0 (f(1) = 0.998169)
+Best Error: | 0.00890554 0.00890554 0.00890554 |
  XYZ : | 0.38839722 0.40229797 0.20140076 |
        | 0.19389343 0.7411041 0.065093994 |
        | 0.010299683 0.061203003 1.0146027 |
diff --git a/profiles/misc/BenQ_RL2455.icc.txt b/profiles/misc/BenQ_RL2455.icc.txt
index 5a81e4f..151b950 100644
--- a/profiles/misc/BenQ_RL2455.icc.txt
+++ b/profiles/misc/BenQ_RL2455.icc.txt
@@ -31,25 +31,25 @@
  'K071' : 'ui08' :     10 : 52024
 
 rTRC : 16-bit table with 5 entries
-  ~= : 2.201905, 0.9993172, 0.000747185, 0.189456, 0.25, -0.0001144409, 0 (Max error: 0.0248416) (D-gap: 2.13832e-06) (f(1) = 1.00002)
+  ~= : 2.201753, 0.9993706, 0.0006862282, 0.189456, 0.25, -9.918213e-05, 0 (Max error: 0.0248302) (D-gap: 7.38353e-06) (f(1) = 1.00002)
 gTRC : 16-bit table with 5 entries
-  ~= : 2.201905, 0.9993172, 0.000747185, 0.189456, 0.25, -0.0001144409, 0 (Max error: 0.0248416) (D-gap: 2.13832e-06) (f(1) = 1.00002)
+  ~= : 2.201753, 0.9993706, 0.0006862282, 0.189456, 0.25, -9.918213e-05, 0 (Max error: 0.0248302) (D-gap: 7.38353e-06) (f(1) = 1.00002)
 bTRC : 16-bit table with 5 entries
-  ~= : 2.201905, 0.9993172, 0.000747185, 0.189456, 0.25, -0.0001144409, 0 (Max error: 0.0248416) (D-gap: 2.13832e-06) (f(1) = 1.00002)
-Best : 2.201905, 0.9993172, 0.000747185, 0.189456, 0.25, -0.0001144409, 0 (D-gap: 2.13832e-06) (f(1) = 1.00002)
-Inv  : 0.4541523, 1.001511, 0.0001146138, 5.27827, 0.047364, -0.0007400513, -0 (D-gap: -1.89245e-06) (f(1) = 0.999992)
-Best Error: | 0.0248416 0.0248416 0.0248416 |
+  ~= : 2.201753, 0.9993706, 0.0006862282, 0.189456, 0.25, -9.918213e-05, 0 (Max error: 0.0248302) (D-gap: 7.38353e-06) (f(1) = 1.00002)
+Best : 2.201753, 0.9993706, 0.0006862282, 0.189456, 0.25, -9.918213e-05, 0 (D-gap: 7.38353e-06) (f(1) = 1.00002)
+Inv  : 0.4541835, 1.001389, 9.931985e-05, 5.27827, 0.047364, -0.0006790161, -0 (D-gap: -1.71512e-05) (f(1) = 0.999985)
+Best Error: | 0.0248302 0.0248302 0.0248302 |
  XYZ : | 0.4651947 0.35595703 0.14302063 |
        | 0.23188782 0.6815338 0.08656311 |
        | 0.009918213 0.09286499 0.72210693 |
  A2B : "A", CLUT, "B"
  "A" : 3 inputs
   A0 : 16-bit table with 256 entries
-  ~= : 2.199462, 1.000076, -0.0001402027, 0.005188067, 0.01176471, -7.629395e-06, 0 (Max error: 0.00392157) (D-gap: -1.30855e-05) (f(1) = 0.999855)
+  ~= : 2.199956, 1, -7.76723e-07, 0.005188067, 0.01176471, -3.051758e-05, 0 (Max error: 0.00392157) (D-gap: -3.46322e-05) (f(1) = 0.999985)
   A1 : 16-bit table with 256 entries
-  ~= : 2.199462, 1.000076, -0.0001402027, 0.005188067, 0.01176471, -7.629395e-06, 0 (Max error: 0.00392157) (D-gap: -1.30855e-05) (f(1) = 0.999855)
+  ~= : 2.199956, 1, -7.76723e-07, 0.005188067, 0.01176471, -3.051758e-05, 0 (Max error: 0.00392157) (D-gap: -3.46322e-05) (f(1) = 0.999985)
   A2 : 16-bit table with 256 entries
-  ~= : 2.199462, 1.000076, -0.0001402027, 0.005188067, 0.01176471, -7.629395e-06, 0 (Max error: 0.00392157) (D-gap: -1.30855e-05) (f(1) = 0.999855)
+  ~= : 2.199956, 1, -7.76723e-07, 0.005188067, 0.01176471, -3.051758e-05, 0 (Max error: 0.00392157) (D-gap: -3.46322e-05) (f(1) = 0.999985)
 CLUT : 16 x 16 x 16 (16 bpp)
  "B" : 3 outputs
   B0 : 16-bit table with 4096 entries
diff --git a/profiles/misc/Coated_FOGRA27_CMYK.icc.txt b/profiles/misc/Coated_FOGRA27_CMYK.icc.txt
index 0d24e19..b5f7c9d 100644
--- a/profiles/misc/Coated_FOGRA27_CMYK.icc.txt
+++ b/profiles/misc/Coated_FOGRA27_CMYK.icc.txt
@@ -19,13 +19,13 @@
  A2B : "A", CLUT, "B"
  "A" : 4 inputs
   A0 : 16-bit table with 256 entries
-  ~= : 1.161658, 0.965477, 0.08204222, 0.8236057, 0.02352941, -0.05311584, 0 (Max error: 0.00190735) (D-gap: 0.000240505) (f(1) = 1.00216)
+  ~= : 1.160143, 0.9660683, 0.08091594, 0.8236057, 0.02352941, -0.0524826, 0 (Max error: 0.00185394) (D-gap: 0.000224769) (f(1) = 1.00209)
   A1 : 16-bit table with 256 entries
-  ~= : 1.185196, 0.9845772, 0.0416452, 0.7782102, 0.01960784, -0.02090454, 0 (Max error: 0.00865173) (D-gap: 0.000137096) (f(1) = 1.01015)
+  ~= : 1.144584, 1, -8.940697e-07, 0.7782102, 0.01960784, 0.004161835, 0 (Max error: 0.00600672) (D-gap: 7.39656e-06) (f(1) = 1.00418)
   A2 : 16-bit table with 256 entries
-  ~= : 1.187326, 0.9800682, 0.03831189, 0.7821012, 0.03529412, -0.01689911, 0 (Max error: 0.00418091) (D-gap: 0.000131184) (f(1) = 1.00489)
+  ~= : 1.187467, 0.9799652, 0.03853871, 0.7821012, 0.03529412, -0.0170517, 0 (Max error: 0.00417328) (D-gap: 0.000124509) (f(1) = 1.00488)
   A3 : 16-bit table with 256 entries
-  ~= : 1.788781, 0.7681046, 0.3830559, 0.7655641, 0.01568628, -0.1776505, 0 (Max error: 0.0762317) (D-gap: 0.000264938) (f(1) = 1.10848)
+  ~= : 1.394918, 0.9022636, 0.1104887, 0.7655641, 0.01568628, -0.04253387, 0 (Max error: 0.0248531) (D-gap: 0.000222261) (f(1) = 0.975243)
 CLUT : 9 x 9 x 9 x 9 (16 bpp)
  "B" : 3 outputs
   B0 : 1, 1, 0, 0, 0, 0, 0 (f(1) = 1) (~Identity)
diff --git a/profiles/misc/Coated_FOGRA39_CMYK.icc.txt b/profiles/misc/Coated_FOGRA39_CMYK.icc.txt
index 75d74c6..90177f7 100644
--- a/profiles/misc/Coated_FOGRA39_CMYK.icc.txt
+++ b/profiles/misc/Coated_FOGRA39_CMYK.icc.txt
@@ -23,13 +23,13 @@
  A2B : "A", CLUT, "B"
  "A" : 4 inputs
   A0 : 16-bit table with 256 entries
-  ~= : 1.054374, 1.018814, -0.007990699, 0.8365758, 0.007843138, 0.006622314, 0 (Max error: 0.0168037) (D-gap: 6.0935e-05) (f(1) = 1.018)
+  ~= : 1.054482, 1.018707, -0.007989861, 0.8365758, 0.007843138, 0.006626129, 0 (Max error: 0.0167007) (D-gap: 6.47497e-05) (f(1) = 1.01789)
   A1 : 16-bit table with 256 entries
   ~= : 1.113842, 1.019768, 0.006776623, 0.7665369, 0.007843138, -0.003089905, 0 (Max error: 0.0232544) (D-gap: 4.07971e-05) (f(1) = 1.02643)
   A2 : 16-bit table with 256 entries
-  ~= : 1.181166, 0.9961662, 0.03711115, 0.7081712, 0.007843138, -0.01995087, 0 (Max error: 0.0163422) (D-gap: 0.000101243) (f(1) = 1.01937)
+  ~= : 1.098878, 1.066177, -0.1630624, 0.7986631, 0.1529412, 0.1223068, 0 (Max error: 0.0139961) (D-gap: 0.000158347) (f(1) = 1.01624)
   A3 : 16-bit table with 256 entries
-  ~= : 1.671706, 0.8024101, 0.3172798, 0.7159533, 0.007843137, -0.1457214, 0 (Max error: 0.0433578) (D-gap: 0.000295554) (f(1) = 1.06207)
+  ~= : 1.253323, 1, -8.940697e-07, 0.7159533, 0.007843137, 0.003326416, 0 (Max error: 0.0246906) (D-gap: 7.42497e-06) (f(1) = 1.00334)
 CLUT : 11 x 11 x 11 x 11 (16 bpp)
  "B" : 3 outputs
   B0 : 1, 1, 0, 0, 0, 0, 0 (f(1) = 1) (~Identity)
diff --git a/profiles/misc/ColorLogic_ISO_Coated_CMYK.icc.txt b/profiles/misc/ColorLogic_ISO_Coated_CMYK.icc.txt
index 14035e3..2704028 100644
--- a/profiles/misc/ColorLogic_ISO_Coated_CMYK.icc.txt
+++ b/profiles/misc/ColorLogic_ISO_Coated_CMYK.icc.txt
@@ -23,11 +23,11 @@
  A2B : "A", CLUT, "B"
  "A" : 4 inputs
   A0 : 16-bit table with 256 entries
-  ~= : 0.4499924, 7.476257, 4.947246, 1.200778, 0.01960784, -2.056915, 0 (Max error: 0.0593643) (D-gap: -7.66497e-05) (f(1) = 1.05045)
+  ~= : 0.8066898, 1, -4.139543e-05, 1.245091, 0.3372549, 0.003826141, 0 (Max error: 0.0194793) (D-gap: -3.12328e-05) (f(1) = 1.0038)
   A1 : 16-bit table with 256 entries
-  ~= : 0.4521776, 7.18457, 4.681381, 1.205447, 0.01960784, -2.013153, 0 (Max error: 0.0558319) (D-gap: -7.66553e-05) (f(1) = 1.04721)
+  ~= : 0.8070059, 1, -3.948808e-05, 1.244774, 0.3372549, 0.003868103, 0 (Max error: 0.0195671) (D-gap: -2.35736e-05) (f(1) = 1.00385)
   A2 : 16-bit table with 256 entries
-  ~= : 0.7746541, 0.9274139, -0.1297604, 1.241552, 0.1490196, 0.1603584, 0 (Max error: 0.0166886) (D-gap: 9.95845e-05) (f(1) = 0.999653)
+  ~= : 0.7474884, 0.9664421, -0.1072783, 1.241552, 0.1490196, 0.1005783, 0 (Max error: 0.0143543) (D-gap: 0.000175521) (f(1) = 0.993221)
   A3 : 16-bit table with 256 entries
   ~= : 0.7854362, 0.9449272, -0.01005363, 1.182879, 0.01568628, 0.00359726, 0 (Max error: 0.0640945) (D-gap: 5.65797e-05) (f(1) = 0.951984)
 CLUT : 17 x 17 x 17 x 17 (16 bpp)
diff --git a/profiles/misc/DisplayCal_ASUS_NonMonotonic.icc.txt b/profiles/misc/DisplayCal_ASUS_NonMonotonic.icc.txt
index 8c9607d..0b05379 100644
--- a/profiles/misc/DisplayCal_ASUS_NonMonotonic.icc.txt
+++ b/profiles/misc/DisplayCal_ASUS_NonMonotonic.icc.txt
@@ -31,25 +31,25 @@
  'meta' : 'dict' :   2312 : 738448
 
 rTRC : 16-bit table with 256 entries
-  ~= : 2.006128, 1.167313, -0.1089448, 0.03579767, 0.1176471, 0.003585815, 0 (Max error: 0.0831201) (D-gap: 0.000162528) (f(1) = 1.12387)
+  ~= : 2.298276, 1, -2.088398e-05, 0.03579767, 0.1176471, -0.003074646, 0 (Max error: 0.0831201) (D-gap: 1.95443e-05) (f(1) = 0.996887)
 gTRC : 16-bit table with 256 entries
-  ~= : 2.287943, 0.9762955, 0.03624173, 0.03112842, 0.1921569, -0.02638245, 0 (Max error: 0.0558824) (D-gap: 0.000189447) (f(1) = 1.00244)
+  ~= : 2.272159, 1, -5.811453e-06, 0.03112842, 0.1921569, -0.01746368, 0 (Max error: 0.0558824) (D-gap: 0.000121736) (f(1) = 0.982525)
 bTRC : 16-bit table with 256 entries
-  ~= : 2.463363, 1.063622, 0.02862149, 1.546164e-09, 0.02352941, -0.000541687, 0 (Max error: 0.152941) (D-gap: 0.000200205) (f(1) = 1.24191)
-Best : 2.463363, 1.063622, 0.02862149, 1.546164e-09, 0.02352941, -0.000541687, 0 (D-gap: 0.000200205) (f(1) = 1.24191)
-Inv  : 0.4059491, 0.8591919, 0.0004654131, 6.467617e+08, 3.638034e-11, -0.02680969, -0 (D-gap: -0.00594747) (f(1) = 0.913582)
-Best Error: | 0.11724 0.104035 0.152941 |
+  ~= : 2.330241, 1, -4.805624e-07, 1.546164e-09, 0.02352941, -0.0001525879, 0 (Max error: 0.152941) (D-gap: 7.89479e-06) (f(1) = 0.999863)
+Best : 2.330241, 1, -4.805624e-07, 1.546164e-09, 0.02352941, -0.0001525879, 0 (D-gap: 7.89479e-06) (f(1) = 0.999863)
+Inv  : 0.4291402, 1, 0.0001525879, 6.467617e+08, 3.638034e-11, 0, -0 (D-gap: -0.000505093) (f(1) = 1.00006)
+Best Error: | 0.100611 0.0871768 0.152941 |
  XYZ : | 0.43673706 0.38032532 0.1471405 |
        | 0.21763611 0.72984314 0.052520752 |
        | 0.0026550293 0.06440735 0.75782776 |
  A2B : "A", CLUT, "B"
  "A" : 3 inputs
   A0 : 16-bit table with 2049 entries
-  ~= : 0.9956406, 1.001862, -0.1228046, 1.000015, 0.125, 0.1227303, 0 (Max error: 0.0187137) (D-gap: 0.00022085) (f(1) = 1.00217)
+  ~= : 1.000023, 1, -0, 1.000015, 0.125, 0, 0 (Max error: 0.0181866) (D-gap: -6.67572e-06) (f(1) = 1) (~Identity)
   A1 : 16-bit table with 2049 entries
-  ~= : 0.9935906, 1.002388, -0.1220437, 1.000015, 0.125, 0.1218605, 0 (Max error: 0.0171154) (D-gap: 0.000234798) (f(1) = 1.00281)
+  ~= : 1.000023, 1, -0, 1.000015, 0.125, 0, 0 (Max error: 0.0163393) (D-gap: -6.67572e-06) (f(1) = 1) (~Identity)
   A2 : 16-bit table with 2049 entries
-  ~= : 0.9960349, 1.003311, -0.02821074, 1.000015, 0.03125, 0.02817535, 0 (Max error: 0.020617) (D-gap: 0.000140041) (f(1) = 1.00331)
+  ~= : 1.001317, 1, 2.384186e-07, 1.000015, 0.03125, 0.000125885, 0 (Max error: 0.0195436) (D-gap: -1.65701e-05) (f(1) = 1.00014) (~Identity)
 CLUT : 33 x 33 x 33 (16 bpp)
  "B" : 3 outputs
   B0 : 1, 1, 0, 0, 0, 0, 0 (f(1) = 1) (~Identity)
diff --git a/profiles/misc/Dot_Gain_20_Grayscale.icc.txt b/profiles/misc/Dot_Gain_20_Grayscale.icc.txt
index cf691f8..07ba151 100644
--- a/profiles/misc/Dot_Gain_20_Grayscale.icc.txt
+++ b/profiles/misc/Dot_Gain_20_Grayscale.icc.txt
@@ -12,13 +12,13 @@
  'kTRC' : 'curv' :    524 : 388
 
 rTRC : 16-bit table with 256 entries
-  ~= : 1.73703, 0.9999313, 3.373019e-05, 0.06290532, 0.02352941, -1.525879e-05, 0 (Max error: 0.000202144) (D-gap: -7.88318e-06) (f(1) = 0.999931)
+  ~= : 1.736919, 1, -3.613532e-07, 0.06290532, 0.02352941, 0, 0 (Max error: 0.000202144) (D-gap: 4.44008e-06) (f(1) = 1.00002)
 gTRC : 16-bit table with 256 entries
-  ~= : 1.73703, 0.9999313, 3.373019e-05, 0.06290532, 0.02352941, -1.525879e-05, 0 (Max error: 0.000202144) (D-gap: -7.88318e-06) (f(1) = 0.999931)
+  ~= : 1.736919, 1, -3.613532e-07, 0.06290532, 0.02352941, 0, 0 (Max error: 0.000202144) (D-gap: 4.44008e-06) (f(1) = 1.00002)
 bTRC : 16-bit table with 256 entries
-  ~= : 1.73703, 0.9999313, 3.373019e-05, 0.06290532, 0.02352941, -1.525879e-05, 0 (Max error: 0.000202144) (D-gap: -7.88318e-06) (f(1) = 0.999931)
-Best : 1.73703, 0.9999313, 3.373019e-05, 0.06290532, 0.02352941, -1.525879e-05, 0 (D-gap: -7.88318e-06) (f(1) = 0.999931)
-Inv  : 0.5756955, 1.000122, 1.526065e-05, 15.89691, 0.001480125, -3.051758e-05, -0 (D-gap: 7.43829e-05) (f(1) = 1.00005)
+  ~= : 1.736919, 1, -3.613532e-07, 0.06290532, 0.02352941, 0, 0 (Max error: 0.000202144) (D-gap: 4.44008e-06) (f(1) = 1.00002)
+Best : 1.736919, 1, -3.613532e-07, 0.06290532, 0.02352941, 0, 0 (D-gap: 4.44008e-06) (f(1) = 1.00002)
+Inv  : 0.5757321, 1, -0, 15.89691, 0.001480125, -1.525879e-05, -0 (D-gap: -5.66281e-05) (f(1) = 0.999985)
 Best Error: | 0.000202144 0.000202144 0.000202144 |
  XYZ : | 0.9642029 0 0 |
        | 0 1 0 |
diff --git a/profiles/misc/Japan_Color_2001_Coated.icc.txt b/profiles/misc/Japan_Color_2001_Coated.icc.txt
index 789cb6c..bc5d969 100644
--- a/profiles/misc/Japan_Color_2001_Coated.icc.txt
+++ b/profiles/misc/Japan_Color_2001_Coated.icc.txt
@@ -19,13 +19,13 @@
  A2B : "A", CLUT, "B"
  "A" : 4 inputs
   A0 : 16-bit table with 256 entries
-  ~= : 1.0495, 1.034943, 0.003219063, 0.5252918, 0.003921569, -0.003570557, 0 (Max error: 0.0335426) (D-gap: 7.2716e-05) (f(1) = 1.03641)
+  ~= : 1.019037, 1, -6.263144e-07, 0.5252918, 0.003921569, -0.001449585, 0 (Max error: 0.0260987) (D-gap: 1.86695e-05) (f(1) = 0.998566)
   A1 : 16-bit table with 256 entries
   ~= : 1.117985, 1.022064, -0.02805667, 0.6270149, 0.02745098, 0.01732254, 0 (Max error: 0.00931168) (D-gap: 0.000110364) (f(1) = 1.01061)
   A2 : 16-bit table with 256 entries
-  ~= : 1.159545, 0.9914627, 0.03615639, 0.3346303, 0.003921568, -0.02250671, 0 (Max error: 0.00820923) (D-gap: 0.000145535) (f(1) = 1.0095)
+  ~= : 1.153396, 0.9972305, 0.02092885, 0.3346303, 0.003921568, -0.01270294, 0 (Max error: 0.00709534) (D-gap: 7.538e-05) (f(1) = 1.0082)
   A3 : 16-bit table with 256 entries
-  ~= : 1.517888, 0.8733749, 0.1790551, 0.3229572, 0.003921569, -0.07411957, 0 (Max error: 0.0159897) (D-gap: 0.000226001) (f(1) = 1.00636)
+  ~= : 1.283242, 1, -8.650124e-06, 0.5892779, 0.03529412, 0.007137299, 0 (Max error: 0.0155337) (D-gap: 2.102e-05) (f(1) = 1.00714)
 CLUT : 9 x 9 x 9 x 9 (16 bpp)
  "B" : 3 outputs
   B0 : 1, 1, 0, 0, 0, 0, 0 (f(1) = 1) (~Identity)
diff --git a/profiles/misc/Kodak_sRGB.icc.txt b/profiles/misc/Kodak_sRGB.icc.txt
index c321094..f2705a2 100644
--- a/profiles/misc/Kodak_sRGB.icc.txt
+++ b/profiles/misc/Kodak_sRGB.icc.txt
@@ -21,14 +21,14 @@
  'bTRC' : 'curv' :    524 : 149844
 
 rTRC : 16-bit table with 256 entries
-  ~= : 2.384167, 0.9483299, 0.03699977, 1.070039, 0.003921569, 0.003894806, 0 (Max error: 0.0147646) (D-gap: 0.000183304) (f(1) = 0.969177)
+  ~= : 2.429111, 0.937191, 0.06168338, 1.070039, 0.003921569, 0.003055573, 0 (Max error: 0.00426031) (D-gap: 0.000184181) (f(1) = 1.00032)
 gTRC : 16-bit table with 256 entries
-  ~= : 2.384167, 0.9483299, 0.03699977, 1.070039, 0.003921569, 0.003894806, 0 (Max error: 0.0147646) (D-gap: 0.000183304) (f(1) = 0.969177)
+  ~= : 2.429111, 0.937191, 0.06168338, 1.070039, 0.003921569, 0.003055573, 0 (Max error: 0.00426031) (D-gap: 0.000184181) (f(1) = 1.00032)
 bTRC : 16-bit table with 256 entries
-  ~= : 2.384167, 0.9483299, 0.03699977, 1.070039, 0.003921569, 0.003894806, 0 (Max error: 0.0147646) (D-gap: 0.000183304) (f(1) = 0.969177)
-Best : 2.384167, 0.9483299, 0.03699977, 1.070039, 0.003921569, 0.003894806, 0 (D-gap: 0.000183304) (f(1) = 0.969177)
-Inv  : 0.4194337, 1.135002, -0.004420613, 0.9345455, 0.004196231, -0.03895569, -0 (D-gap: -0.00769717) (f(1) = 1.01379)
-Best Error: | 0.0147646 0.0147646 0.0147646 |
+  ~= : 2.429111, 0.937191, 0.06168338, 1.070039, 0.003921569, 0.003055573, 0 (Max error: 0.00426031) (D-gap: 0.000184181) (f(1) = 1.00032)
+Best : 2.429111, 0.937191, 0.06168338, 1.070039, 0.003921569, 0.003055573, 0 (D-gap: 0.000184181) (f(1) = 1.00032)
+Inv  : 0.4116732, 1.170876, -0.003577695, 0.9345455, 0.004196231, -0.06580353, -0 (D-gap: -0.00415665) (f(1) = 0.99987)
+Best Error: | 0.00426031 0.00426031 0.00426031 |
  XYZ : | 0.43763733 0.38841248 0.14241028 |
        | 0.21495056 0.7129059 0.072128296 |
        | 0.011260986 0.080718994 0.72587585 |
diff --git a/profiles/misc/MR2416GSDF.icc.txt b/profiles/misc/MR2416GSDF.icc.txt
index d36d6aa..4036b3f 100644
--- a/profiles/misc/MR2416GSDF.icc.txt
+++ b/profiles/misc/MR2416GSDF.icc.txt
@@ -18,14 +18,14 @@
  'bTRC' : 'curv' :    524 : 1592
 
 rTRC : 16-bit table with 256 entries
-  ~= : 3.713728, 0.8151588, 0.1128933, 0.04863813, 0.01568628, 0.0004997253, 0 (Max error: 0.0891655) (D-gap: 0.000188509) (f(1) = 0.75806)
+  ~= : 6.107902, 0.5691719, 0.4350795, 0.04863813, 0.01568628, -0.005722046, 0 (Max error: 0.0100443) (D-gap: 0.000529933) (f(1) = 1.02042)
 gTRC : 16-bit table with 256 entries
-  ~= : 3.713728, 0.8151588, 0.1128933, 0.04863813, 0.01568628, 0.0004997253, 0 (Max error: 0.0891655) (D-gap: 0.000188509) (f(1) = 0.75806)
+  ~= : 6.107902, 0.5691719, 0.4350795, 0.04863813, 0.01568628, -0.005722046, 0 (Max error: 0.0100443) (D-gap: 0.000529933) (f(1) = 1.02042)
 bTRC : 16-bit table with 256 entries
-  ~= : 3.713728, 0.8151588, 0.1128933, 0.04863813, 0.01568628, 0.0004997253, 0 (Max error: 0.0891655) (D-gap: 0.000188509) (f(1) = 0.75806)
-Best : 3.713728, 0.8151588, 0.1128933, 0.04863813, 0.01568628, 0.0004997253, 0 (D-gap: 0.000188509) (f(1) = 0.75806)
-Inv  : 0.2692712, 2.136414, -0.00106762, 20.56, 0.0007629511, -0.1383667, -0 (D-gap: -0.0207493) (f(1) = 1.08822)
-Best Error: | 0.0891655 0.0891655 0.0891655 |
+  ~= : 6.107902, 0.5691719, 0.4350795, 0.04863813, 0.01568628, -0.005722046, 0 (Max error: 0.0100443) (D-gap: 0.000529933) (f(1) = 1.02042)
+Best : 6.107902, 0.5691719, 0.4350795, 0.04863813, 0.01568628, -0.005722046, 0 (D-gap: 0.000529933) (f(1) = 1.02042)
+Inv  : 0.1637223, 31.27466, 0.178955, 20.56, 0.0007629511, -0.7644653, -0 (D-gap: -0.0100443) (f(1) = 0.994202)
+Best Error: | 0.0100443 0.0100443 0.0100443 |
  XYZ : | 0.4459076 0.3938141 0.13781738 |
        | 0.22624207 0.73461914 0.053771973 |
        | 0.004348755 0.08099365 0.7522278 |
diff --git a/profiles/misc/Phase_One_P25.icc.txt b/profiles/misc/Phase_One_P25.icc.txt
index 9076f1c..d344772 100644
--- a/profiles/misc/Phase_One_P25.icc.txt
+++ b/profiles/misc/Phase_One_P25.icc.txt
@@ -19,10 +19,14 @@
  'tech' : 'sig ' :     12 : 219352
 
 rTRC : 16-bit table with 256 entries
-  ~= : 0.3872528, 1.663193, 0.01272831, 3.844358, 0.007843138, -0.212326, 0 (Max error: 0.0204617) (D-gap: 1.67042e-05) (f(1) = 1.00896)
+  ~= : 0.378341, 1.767159, 0.01614364, 3.844358, 0.007843138, -0.2351913, 0 (Max error: 0.0199992) (D-gap: 9.07481e-06) (f(1) = 1.00939)
 gTRC : 16-bit table with 256 entries
+  ~= : 0.2420229, 17.14722, 0.625267, 5.754864, 0.003921569, -0.8921661, 0 (Max error: 0.223358) (D-gap: 0.000140799) (f(1) = 1.1144)
 bTRC : 16-bit table with 256 entries
-  ~= : 0.688842, 1.047989, -0.01162482, 2.721141, 0.01176471, 0.0254097, 0 (Max error: 0.0697136) (D-gap: 0.000136185) (f(1) = 1.05024)
+  ~= : 0.669867, 1, -1.56872e-05, 2.64747, 0.05882354, 0.005882263, 0 (Max error: 0.0488108) (D-gap: -4.27663e-06) (f(1) = 1.00588)
+Best : 0.378341, 1.767159, 0.01614364, 3.844358, 0.007843138, -0.2351913, 0 (D-gap: 9.07481e-06) (f(1) = 1.00939)
+Inv  : 2.643118, 0.806221, 0.1896162, 0.2601215, 0.03015183, -0.009002686, -0 (D-gap: 0.000124334) (f(1) = 0.980007)
+Best Error: | 0.0199992 0.102694 0.124728 |
  XYZ : | 0.64790344 0.35736084 0.15641785 |
        | 0.3829193 1.109726 0 |
        | 0.08326721 0.6792755 0.52342224 |
@@ -30,8 +34,11 @@
  A2B : "A", CLUT, "B"
  "A" : 3 inputs
   A0 : 16-bit table with 256 entries
+  ~= : 0.4952933, 1, -8.765608e-06, 7.968518, 0.04313726, 0.1330681, 0 (Max error: 0.267904) (D-gap: 9.10759e-05) (f(1) = 1.13308)
   A1 : 16-bit table with 256 entries
+  ~= : 0.4952933, 1, -8.765608e-06, 7.968518, 0.04313726, 0.1330681, 0 (Max error: 0.267904) (D-gap: 9.10759e-05) (f(1) = 1.13308)
   A2 : 16-bit table with 256 entries
+  ~= : 0.4952933, 1, -8.765608e-06, 7.968518, 0.04313726, 0.1330681, 0 (Max error: 0.267904) (D-gap: 9.10759e-05) (f(1) = 1.13308)
 CLUT : 33 x 33 x 33 (16 bpp)
  "B" : 3 outputs
   B0 : 1, 1, 0, 0, 0, 0, 0 (f(1) = 1) (~Identity)
diff --git a/profiles/misc/SM245B.icc.txt b/profiles/misc/SM245B.icc.txt
index 7575c03..0d233bb 100644
--- a/profiles/misc/SM245B.icc.txt
+++ b/profiles/misc/SM245B.icc.txt
@@ -20,13 +20,13 @@
  'view' : 'view' :     36 : 2368
 
 rTRC : 16-bit table with 256 entries
-  ~= : 2.200449, 0.9998741, 0.0001119216, 0.00389105, 0.01176471, -2.288818e-05, 0 (Max error: 0.00392157) (D-gap: -1.06799e-05) (f(1) = 0.99995)
+  ~= : 2.200056, 1, -7.76723e-07, 0.00389105, 0.01176471, 0, 0 (Max error: 0.00392157) (D-gap: 1.11191e-05) (f(1) = 1.00002)
 gTRC : 16-bit table with 256 entries
-  ~= : 2.200449, 0.9998741, 0.0001119216, 0.00389105, 0.01176471, -2.288818e-05, 0 (Max error: 0.00392157) (D-gap: -1.06799e-05) (f(1) = 0.99995)
+  ~= : 2.200056, 1, -7.76723e-07, 0.00389105, 0.01176471, 0, 0 (Max error: 0.00392157) (D-gap: 1.11191e-05) (f(1) = 1.00002)
 bTRC : 16-bit table with 256 entries
-  ~= : 2.200449, 0.9998741, 0.0001119216, 0.00389105, 0.01176471, -2.288818e-05, 0 (Max error: 0.00392157) (D-gap: -1.06799e-05) (f(1) = 0.99995)
-Best : 2.200449, 0.9998741, 0.0001119216, 0.00389105, 0.01176471, -2.288818e-05, 0 (D-gap: -1.06799e-05) (f(1) = 0.99995)
-Inv  : 0.4544528, 1.000282, 2.289464e-05, 257, 4.577707e-05, -0.0001144409, -0 (D-gap: 0.000944732) (f(1) = 1.00002)
+  ~= : 2.200056, 1, -7.76723e-07, 0.00389105, 0.01176471, 0, 0 (Max error: 0.00392157) (D-gap: 1.11191e-05) (f(1) = 1.00002)
+Best : 2.200056, 1, -7.76723e-07, 0.00389105, 0.01176471, 0, 0 (D-gap: 1.11191e-05) (f(1) = 1.00002)
+Inv  : 0.4545339, 1, -0, 257, 4.577707e-05, 0, -0 (D-gap: -0.00110817) (f(1) = 1)
 Best Error: | 0.00392157 0.00392157 0.00392157 |
  XYZ : | 0.45872498 0.32295227 0.16848755 |
        | 0.2328949 0.6973877 0.06971741 |
diff --git a/profiles/misc/SWOP_Coated_20_GCR_CMYK.icc.txt b/profiles/misc/SWOP_Coated_20_GCR_CMYK.icc.txt
index ea34877..15ada1b 100644
--- a/profiles/misc/SWOP_Coated_20_GCR_CMYK.icc.txt
+++ b/profiles/misc/SWOP_Coated_20_GCR_CMYK.icc.txt
@@ -20,13 +20,13 @@
  A2B : "A", CLUT, "B"
  "A" : 4 inputs
   A0 : 16-bit table with 256 entries
-  ~= : 3.096739, 0.7520752, 0.6144606, 0.7579767, 0.01960784, -0.223053, 0 (Max error: 0.397942) (D-gap: 0.00023533) (f(1) = 2.4071)
+  ~= : 1.257261, 1, -3.280118e-06, 0.7579767, 0.01960784, 0.007762909, 0 (Max error: 0.0241022) (D-gap: 2.92771e-05) (f(1) = 1.00777)
   A1 : 16-bit table with 256 entries
-  ~= : 1.250859, 0.5047684, 9.68434, 0.7043536, 0.2078432, -17.20215, 0 (Max error: 0.104106) (D-gap: -0.0011314) (f(1) = 1.03662)
+  ~= : 1.388345, 1, -8.363277e-07, 0.6634241, 0.01568628, 0.007305145, 0 (Max error: 0.0358348) (D-gap: 2.25063e-05) (f(1) = 1.00732)
   A2 : 16-bit table with 256 entries
-  ~= : 1.250859, 0.5047684, 9.68434, 0.7043536, 0.2078432, -17.20215, 0 (Max error: 0.104106) (D-gap: -0.0011314) (f(1) = 1.03662)
+  ~= : 1.388345, 1, -8.363277e-07, 0.6634241, 0.01568628, 0.007305145, 0 (Max error: 0.0358348) (D-gap: 2.25063e-05) (f(1) = 1.00732)
   A3 : 16-bit table with 256 entries
-  ~= : 1.250859, 0.5047684, 9.68434, 0.7043536, 0.2078432, -17.20215, 0 (Max error: 0.104106) (D-gap: -0.0011314) (f(1) = 1.03662)
+  ~= : 1.388345, 1, -8.363277e-07, 0.6634241, 0.01568628, 0.007305145, 0 (Max error: 0.0358348) (D-gap: 2.25063e-05) (f(1) = 1.00732)
 CLUT : 16 x 16 x 16 x 16 (16 bpp)
  "B" : 3 outputs
   B0 : 1, 1, 0, 0, 0, 0, 0 (f(1) = 1) (~Identity)
diff --git a/profiles/misc/US_Web_Coated_SWOP_CMYK.icc.txt b/profiles/misc/US_Web_Coated_SWOP_CMYK.icc.txt
index 990ab81..c1f3b7a 100644
--- a/profiles/misc/US_Web_Coated_SWOP_CMYK.icc.txt
+++ b/profiles/misc/US_Web_Coated_SWOP_CMYK.icc.txt
@@ -19,13 +19,13 @@
  A2B : "A", CLUT, "B"
  "A" : 4 inputs
   A0 : 16-bit table with 256 entries
-  ~= : 0.7884726, 1.139404, 0.1396209, 2.132296, 0.003921569, -0.2085495, 0 (Max error: 0.00648499) (D-gap: 0.000136248) (f(1) = 1.00553)
+  ~= : 0.7457523, 1.273102, 0.2824915, 2.132296, 0.003921569, -0.3862457, 0 (Max error: 0.00514561) (D-gap: 5.51855e-05) (f(1) = 1.00403)
   A1 : 16-bit table with 256 entries
   ~= : 1.001599, 0.9828033, -0.01541652, 1.622568, 0.01568628, 0.02549744, 0 (Max error: 0.00873214) (D-gap: 4.53889e-05) (f(1) = 0.992756)
   A2 : 16-bit table with 256 entries
   ~= : 1.043431, 1.001129, -0.01570399, 1.68677, 0.01568628, 0.02659988, 0 (Max error: 0.0127546) (D-gap: 0.00014074) (f(1) = 1.01135)
   A3 : 16-bit table with 256 entries
-  ~= : 2.249374, 0.7321663, 1.020107, 1.840467, 0.003921569, -1.044983, 0 (Max error: 0.515724) (D-gap: 8.38134e-05) (f(1) = 2.4856)
+  ~= : 1.144744, 0.9138336, 0.1820309, 1.840467, 0.003921569, -0.1380463, 0 (Max error: 0.0261459) (D-gap: 0.000190625) (f(1) = 0.972252)
 CLUT : 9 x 9 x 9 x 9 (16 bpp)
  "B" : 3 outputs
   B0 : 1, 1, 0, 0, 0, 0, 0 (f(1) = 1) (~Identity)
diff --git a/profiles/misc/calibrated_nonzero_black.icc.txt b/profiles/misc/calibrated_nonzero_black.icc.txt
index 3d398a2..6c191f1 100644
--- a/profiles/misc/calibrated_nonzero_black.icc.txt
+++ b/profiles/misc/calibrated_nonzero_black.icc.txt
@@ -19,14 +19,14 @@
  'vcgt' : 'vcgt' :   1554 : 2180
 
 rTRC : 16-bit table with 256 entries
-  ~= : 2.199836, 0.9994049, -3.469951e-05, 0.3307393, 0.003921569, 0.001289368, 0 (Max error: 0.0047445) (D-gap: -2.67266e-06) (f(1) = 0.999908)
+  ~= : 2.199834, 0.9994049, -3.508671e-05, 0.3307393, 0.003921569, 0.001289368, 0 (Max error: 0.00474447) (D-gap: -2.67371e-06) (f(1) = 0.999908)
 gTRC : 16-bit table with 256 entries
-  ~= : 2.199836, 0.9994049, -3.469951e-05, 0.3307393, 0.003921569, 0.001289368, 0 (Max error: 0.0047445) (D-gap: -2.67266e-06) (f(1) = 0.999908)
+  ~= : 2.199834, 0.9994049, -3.508671e-05, 0.3307393, 0.003921569, 0.001289368, 0 (Max error: 0.00474447) (D-gap: -2.67371e-06) (f(1) = 0.999908)
 bTRC : 16-bit table with 256 entries
-  ~= : 2.199836, 0.9994049, -3.469951e-05, 0.3307393, 0.003921569, 0.001289368, 0 (Max error: 0.0047445) (D-gap: -2.67266e-06) (f(1) = 0.999908)
-Best : 2.199836, 0.9994049, -3.469951e-05, 0.3307393, 0.003921569, 0.001289368, 0 (D-gap: -2.67266e-06) (f(1) = 0.999908)
-Inv  : 0.4545792, 1.001312, -0.00129106, 3.02353, 0.001297017, 1.907349e-05, -0 (D-gap: 0.000822931) (f(1) = 1.00003)
-Best Error: | 0.0047445 0.0047445 0.0047445 |
+  ~= : 2.199834, 0.9994049, -3.508671e-05, 0.3307393, 0.003921569, 0.001289368, 0 (Max error: 0.00474447) (D-gap: -2.67371e-06) (f(1) = 0.999908)
+Best : 2.199834, 0.9994049, -3.508671e-05, 0.3307393, 0.003921569, 0.001289368, 0 (D-gap: -2.67371e-06) (f(1) = 0.999908)
+Inv  : 0.4545797, 1.001312, -0.00129106, 3.02353, 0.001297017, 1.907349e-05, -0 (D-gap: 0.000822901) (f(1) = 1.00003)
+Best Error: | 0.00474447 0.00474447 0.00474447 |
  XYZ : | 0.436615 0.38534546 0.14224243 |
        | 0.22212219 0.71839905 0.0594635 |
        | 0.012954712 0.09654236 0.71539307 |
diff --git a/profiles/misc/crbug_1017960_19.icc.txt b/profiles/misc/crbug_1017960_19.icc.txt
index 5707278..21ae4f3 100644
--- a/profiles/misc/crbug_1017960_19.icc.txt
+++ b/profiles/misc/crbug_1017960_19.icc.txt
@@ -21,14 +21,14 @@
  'mmod' : 'mmod' :     40 : 3860
 
 rTRC : 16-bit table with 256 entries
-  ~= : 4.841902, 0.719986, 0.3762827, 0.1407054, 0.2431373, -0.02175903, 0 (Max error: 0.127342) (D-gap: -2.65129e-05) (f(1) = 1.53802)
+  ~= : 6.241715, 0.4478817, 0.5665821, 0.1407054, 0.2431373, -0.05149078, 0 (Max error: 0.0142212) (D-gap: 0.000690889) (f(1) = 1.04203)
 gTRC : 16-bit table with 256 entries
-  ~= : 2.197707, 1.013412, -0.02046552, 0.09246967, 0.1333333, 0.003822327, 0 (Max error: 0.0139048) (D-gap: 5.78072e-05) (f(1) = 0.988342)
+  ~= : 2.198663, 1.013107, -0.02007966, 0.09246967, 0.1333333, 0.00378418, 0 (Max error: 0.0138438) (D-gap: 5.86417e-05) (f(1) = 0.988472)
 bTRC : 16-bit table with 256 entries
-  ~= : 1.923471, 1.129272, 0.06547091, 0.0077821, 0.003921569, -0.005767822, 0 (Max error: 0.169685) (D-gap: 0.00018987) (f(1) = 1.40215)
-Best : 4.841902, 0.719986, 0.3762827, 0.1407054, 0.2431373, -0.02175903, 0 (D-gap: -2.65129e-05) (f(1) = 1.53802)
-Inv  : 0.2065304, 4.906921, 0.1067699, 7.107047, 0.03421073, -0.5224304, -0 (D-gap: 0.000164136) (f(1) = 0.872658)
-Best Error: | 0.127342 0.127342 0.127342 |
+  ~= : 1.462179, 1, -2.393499e-07, 0.0077821, 0.003921569, -0.0002593994, 0 (Max error: 0.0897047) (D-gap: 1.28816e-05) (f(1) = 0.999756)
+Best : 2.198663, 1.013107, -0.02007966, 0.09246967, 0.1333333, 0.00378418, 0 (D-gap: 5.86417e-05) (f(1) = 0.988472)
+Inv  : 0.4548219, 0.971817, -0.00367753, 10.81436, 0.01232929, 0.01985931, -0 (D-gap: -0.000332966) (f(1) = 1.00521)
+Best Error: | 0.0450786 0.0138438 0.154441 |
  XYZ : | 0.3805542 0.434021 0.14962769 |
        | 0.21951294 0.68196106 0.098526 |
        | 0.04006958 0.088272095 0.6965637 |
diff --git a/profiles/misc/crbug_976551.icc.txt b/profiles/misc/crbug_976551.icc.txt
index c1b823a..2e7d10b 100644
--- a/profiles/misc/crbug_976551.icc.txt
+++ b/profiles/misc/crbug_976551.icc.txt
@@ -21,14 +21,14 @@
  'mmod' : 'mmod' :     40 : 13080
 
 rTRC : 16-bit table with 1024 entries
-  ~= : 1.439447, 1.07946, -0.07423442, 0.1001471, 0.07526882, 0.006874084, 0 (Max error: 0.0193188) (D-gap: 0.00012941) (f(1) = 1.01437)
+  ~= : 1.585101, 1, -1.342595e-05, 0.1001471, 0.07526882, -0.008956909, 0 (Max error: 0.0193188) (D-gap: 6.78343e-05) (f(1) = 0.991028)
 gTRC : 16-bit table with 1024 entries
-  ~= : 1.436169, 1.070824, -0.07745938, 0.1031524, 0.07233626, 0.007606506, 0 (Max error: 0.0184169) (D-gap: 0.000144845) (f(1) = 0.998066)
+  ~= : 1.586461, 1, -1.055747e-05, 0.1031524, 0.07233626, -0.007980347, 0 (Max error: 0.0184169) (D-gap: 5.51399e-05) (f(1) = 0.992008)
 bTRC : 16-bit table with 1024 entries
-  ~= : 1.508441, 1.110535, -0.05764122, 0.09840215, 0.07722384, 0.003158569, 0 (Max error: 0.0494118) (D-gap: 0.000133727) (f(1) = 1.08383)
-Best : 1.439447, 1.07946, -0.07423442, 0.1001471, 0.07526882, 0.006874084, 0 (D-gap: 0.00012941) (f(1) = 1.01437)
-Inv  : 0.6947112, 0.8958664, -0.006158261, 9.985308, 0.007537957, 0.06882095, -0 (D-gap: -0.000705704) (f(1) = 0.990749)
-Best Error: | 0.0193188 0.0178842 0.0199659 |
+  ~= : 1.444059, 1.080429, -0.06959254, 0.09840215, 0.07722384, 0.005664825, 0 (Max error: 0.0213387) (D-gap: 0.000134651) (f(1) = 1.0213)
+Best : 1.444059, 1.080429, -0.06959254, 0.09840215, 0.07722384, 0.005664825, 0 (D-gap: 0.000134651) (f(1) = 1.0213)
+Inv  : 0.6924927, 0.8943901, -0.005066564, 10.16238, 0.007598992, 0.06447601, -0 (D-gap: -0.000520892) (f(1) = 0.986366)
+Best Error: | 0.0190027 0.01756 0.0213387 |
  XYZ : | 0.512558 0.29548645 0.15614319 |
        | 0.24029541 0.7005768 0.059127808 |
        | -0.0010375977 0.042297363 0.7836609 |
diff --git a/profiles/misc/sRGB_Calibrated_Heterogeneous.icc.txt b/profiles/misc/sRGB_Calibrated_Heterogeneous.icc.txt
index cba6c58..3893e0e 100644
--- a/profiles/misc/sRGB_Calibrated_Heterogeneous.icc.txt
+++ b/profiles/misc/sRGB_Calibrated_Heterogeneous.icc.txt
@@ -16,14 +16,14 @@
  'cprt' : 'mluc' :     60 : 1944
 
 rTRC : 16-bit table with 256 entries
-  ~= : 2.232039, 1.004654, -0.004092941, 0.01206226, 0.03921569, -7.629395e-05, 0 (Max error: 0.00611324) (D-gap: 2.42817e-05) (f(1) = 1.00117)
+  ~= : 2.231967, 1.004677, -0.00411076, 0.01206226, 0.03921569, -9.918213e-05, 0 (Max error: 0.00580043) (D-gap: 9.16654e-07) (f(1) = 1.00115)
 gTRC : 16-bit table with 256 entries
-  ~= : 2.197513, 1.010475, -0.009469209, 0.009727627, 0.02352941, 0.0001678467, 0 (Max error: 0.00431907) (D-gap: 2.74072e-05) (f(1) = 1.00237)
+  ~= : 2.198234, 1.010315, -0.008928984, 0.009727627, 0.02352941, 0.000164032, 0 (Max error: 0.00394905) (D-gap: 3.07562e-05) (f(1) = 1.00321)
 bTRC : 16-bit table with 256 entries
-  ~= : 2.261958, 1.004646, -0.004023268, 0.0077821, 0.01960785, 6.103516e-05, 0 (Max error: 0.00378567) (D-gap: -8.82382e-06) (f(1) = 1.00146)
-Best : 2.232039, 1.004654, -0.004092941, 0.01206226, 0.03921569, -7.629395e-05, 0 (D-gap: 2.42817e-05) (f(1) = 1.00117)
-Inv  : 0.4480209, 0.9897156, 7.550931e-05, 82.90323, 0.0004730297, 0.004066467, -0 (D-gap: -0.000688914) (f(1) = 0.999474)
-Best Error: | 0.00611324 0.0057922 0.00695762 |
+  ~= : 2.261967, 1.004639, -0.00400671, 0.0077821, 0.01960785, 8.010864e-05, 0 (Max error: 0.00375134) (D-gap: 1.04425e-05) (f(1) = 1.0015)
+Best : 2.231967, 1.004677, -0.00411076, 0.01206226, 0.03921569, -9.918213e-05, 0 (D-gap: 9.16654e-07) (f(1) = 1.00115)
+Inv  : 0.4480354, 0.989666, 9.815718e-05, 82.90323, 0.0004730297, 0.004089355, -0 (D-gap: -3.39784e-05) (f(1) = 0.999481)
+Best Error: | 0.00580043 0.00582463 0.00695762 |
  XYZ : | 0.4492798 0.38258362 0.13233948 |
        | 0.22447205 0.7223511 0.05317688 |
        | 0.0011291504 0.05355835 0.7702179 |
diff --git a/profiles/sRGB_Facebook.icc.txt b/profiles/sRGB_Facebook.icc.txt
index 89af818..538878f 100644
--- a/profiles/sRGB_Facebook.icc.txt
+++ b/profiles/sRGB_Facebook.icc.txt
@@ -17,15 +17,15 @@
  'bTRC' : 'curv' :     64 : 460
 
 rTRC : 16-bit table with 26 entries (~sRGB)
-  ~= : 2.38273, 0.9532852, 0.04522569, 0.07743954, 0.04, 0.0005531311, 0 (Max error: 0.00213668) (D-gap: 0.000140188) (f(1) = 0.997005) (~sRGB)
+  ~= : 2.387424, 0.9516296, 0.04789746, 0.07743954, 0.04, 0.0003929138, 0 (Max error: 0.00184847) (D-gap: 0.000151274) (f(1) = 0.999268) (~sRGB)
 gTRC : 16-bit table with 26 entries (~sRGB)
-  ~= : 2.38273, 0.9532852, 0.04522569, 0.07743954, 0.04, 0.0005531311, 0 (Max error: 0.00213668) (D-gap: 0.000140188) (f(1) = 0.997005) (~sRGB)
+  ~= : 2.387424, 0.9516296, 0.04789746, 0.07743954, 0.04, 0.0003929138, 0 (Max error: 0.00184847) (D-gap: 0.000151274) (f(1) = 0.999268) (~sRGB)
 bTRC : 16-bit table with 26 entries (~sRGB)
-  ~= : 2.38273, 0.9532852, 0.04522569, 0.07743954, 0.04, 0.0005531311, 0 (Max error: 0.00213668) (D-gap: 0.000140188) (f(1) = 0.997005) (~sRGB)
+  ~= : 2.387424, 0.9516296, 0.04789746, 0.07743954, 0.04, 0.0003929138, 0 (Max error: 0.00184847) (D-gap: 0.000151274) (f(1) = 0.999268) (~sRGB)
 TRCs ≈ sRGB
-Best : 2.38273, 0.9532852, 0.04522569, 0.07743954, 0.04, 0.0005531311, 0 (D-gap: 0.000140188) (f(1) = 0.997005) (~sRGB)
-Inv  : 0.4196866, 1.120888, -0.0006199979, 12.9133, 0.003097581, -0.04740906, -0 (D-gap: -0.00190929) (f(1) = 1.00132)
-Best Error: | 0.00213668 0.00213668 0.00213668 |
+Best : 2.387424, 0.9516296, 0.04789746, 0.07743954, 0.04, 0.0003929138, 0 (D-gap: 0.000151274) (f(1) = 0.999268) (~sRGB)
+Inv  : 0.4188614, 1.125809, -0.0004423458, 12.9133, 0.003097581, -0.05030823, -0 (D-gap: -0.00200752) (f(1) = 1.00032)
+Best Error: | 0.00184847 0.00184847 0.00184847 |
  XYZ : | 0.43606567 0.3851471 0.1430664 |
        | 0.2224884 0.71687317 0.06060791 |
        | 0.013916016 0.097076416 0.71409607 |
diff --git a/skcms.cc b/skcms.cc
index c54acb6..cc5738d 100644
--- a/skcms.cc
+++ b/skcms.cc
@@ -1656,11 +1656,10 @@
 static float rg_nonlinear(float x,
                           const skcms_Curve* curve,
                           const skcms_TransferFunction* tf,
-                          const float P[3],
                           float dfdP[3]) {
     const float y = eval_curve(curve, x);
 
-    const float g = P[0],  a = P[1],  b = P[2],
+    const float g = tf->g, a = tf->a, b = tf->b,
                 c = tf->c, d = tf->d, f = tf->f;
 
     const float Y = fmaxf_(a*y + b, 0.0f),
@@ -1683,11 +1682,12 @@
 }
 
 static bool gauss_newton_step(const skcms_Curve* curve,
-                              const skcms_TransferFunction* tf,
-                              float P[3],
+                                    skcms_TransferFunction* tf,
                               float x0, float dx, int N) {
     // We'll sample x from the range [x0,x1] (both inclusive) N times with even spacing.
     //
+    // Let P = [ tf->g, tf->a, tf->b ] (the three terms that we're adjusting).
+    //
     // We want to do P' = P + (Jf^T Jf)^-1 Jf^T r(P),
     //   where r(P) is the residual vector
     //   and Jf is the Jacobian matrix of f(), ∂r/∂P.
@@ -1729,7 +1729,7 @@
         float x = x0 + i*dx;
 
         float dfdP[3] = {0,0,0};
-        float resid = rg_nonlinear(x,curve,tf,P, dfdP);
+        float resid = rg_nonlinear(x,curve,tf, dfdP);
 
         for (int r = 0; r < 3; r++) {
             for (int c = 0; c < 3; c++) {
@@ -1756,58 +1756,85 @@
 
     // 4) multiply inverse lhs by rhs
     skcms_Vector3 dP = mv_mul(&lhs_inv, &rhs);
-    P[0] += dP.vals[0];
-    P[1] += dP.vals[1];
-    P[2] += dP.vals[2];
-    return isfinitef_(P[0]) && isfinitef_(P[1]) && isfinitef_(P[2]);
+    tf->g += dP.vals[0];
+    tf->a += dP.vals[1];
+    tf->b += dP.vals[2];
+    return isfinitef_(tf->g) && isfinitef_(tf->a) && isfinitef_(tf->b);
 }
 
+static float max_roundtrip_error_checked(const skcms_Curve* curve,
+                                         const skcms_TransferFunction* tf_inv) {
+    skcms_TransferFunction tf;
+    if (!skcms_TransferFunction_invert(tf_inv, &tf) || sRGBish != classify(tf)) {
+        return INFINITY_;
+    }
+
+    skcms_TransferFunction tf_inv_again;
+    if (!skcms_TransferFunction_invert(&tf, &tf_inv_again)) {
+        return INFINITY_;
+    }
+
+    return skcms_MaxRoundtripError(curve, &tf_inv_again);
+}
 
 // Fit the points in [L,N) to the non-linear piece of tf, or return false if we can't.
 static bool fit_nonlinear(const skcms_Curve* curve, int L, int N, skcms_TransferFunction* tf) {
-    float P[3] = { tf->g, tf->a, tf->b };
+    // This enforces a few constraints that are not modeled in gauss_newton_step()'s optimization.
+    auto fixup_tf = [tf]() {
+        // a must be non-negative. That ensures the function is monotonically increasing.
+        // We don't really know how to fix up a if it goes negative.
+        if (tf->a < 0) {
+            return false;
+        }
+        // ad+b must be non-negative. That ensures we don't end up with complex numbers in powf.
+        // We feel just barely not uneasy enough to tweak b so ad+b is zero in this case.
+        if (tf->a * tf->d + tf->b < 0) {
+            tf->b = -tf->a * tf->d;
+        }
+        assert (tf->a >= 0 &&
+                tf->a * tf->d + tf->b >= 0);
+
+        // cd+f must be ~= (ad+b)^g+e. That ensures the function is continuous. We keep e as a free
+        // parameter so we can guarantee this.
+        tf->e =   tf->c*tf->d + tf->f
+          - powf_(tf->a*tf->d + tf->b, tf->g);
+
+        return true;
+    };
+
+    if (!fixup_tf()) {
+        return false;
+    }
 
     // No matter where we start, dx should always represent N even steps from 0 to 1.
     const float dx = 1.0f / (N-1);
 
+    skcms_TransferFunction best_tf = *tf;
+    float best_max_error = INFINITY_;
+
+    // Need this or several curves get worse... *sigh*
+    float init_error = max_roundtrip_error_checked(curve, tf);
+    if (init_error < best_max_error) {
+        best_max_error = init_error;
+        best_tf = *tf;
+    }
+
     // As far as we can tell, 1 Gauss-Newton step won't converge, and 3 steps is no better than 2.
-    for (int j = 0; j < 2; j++) {
-        // These extra constraints a >= 0 and ad+b >= 0 are not modeled in the optimization.
-        // We don't really know how to fix up a if it goes negative.
-        if (P[1] < 0) {
-            return false;
+    for (int j = 0; j < 8; j++) {
+        if (!gauss_newton_step(curve, tf, L*dx, dx, N-L) || !fixup_tf()) {
+            *tf = best_tf;
+            return isfinitef_(best_max_error);
         }
-        // If ad+b goes negative, we feel just barely not uneasy enough to tweak b so ad+b is zero.
-        if (P[1] * tf->d + P[2] < 0) {
-            P[2] = -P[1] * tf->d;
-        }
-        assert (P[1] >= 0 &&
-                P[1] * tf->d + P[2] >= 0);
 
-        if (!gauss_newton_step(curve, tf,
-                               P,
-                               L*dx, dx, N-L)) {
-            return false;
+        float max_error = max_roundtrip_error_checked(curve, tf);
+        if (max_error < best_max_error) {
+            best_max_error = max_error;
+            best_tf = *tf;
         }
     }
 
-    // We need to apply our fixups one last time
-    if (P[1] < 0) {
-        return false;
-    }
-    if (P[1] * tf->d + P[2] < 0) {
-        P[2] = -P[1] * tf->d;
-    }
-
-    assert (P[1] >= 0 &&
-            P[1] * tf->d + P[2] >= 0);
-
-    tf->g = P[0];
-    tf->a = P[1];
-    tf->b = P[2];
-    tf->e =   tf->c*tf->d + tf->f
-      - powf_(tf->a*tf->d + tf->b, tf->g);
-    return true;
+    *tf = best_tf;
+    return isfinitef_(best_max_error);
 }
 
 bool skcms_ApproximateCurve(const skcms_Curve* curve,
@@ -1874,7 +1901,9 @@
             }
 
             // We fit tf_inv, so calculate tf to keep in sync.
+            // fit_nonlinear() should guarantee invertibility.
             if (!skcms_TransferFunction_invert(&tf_inv, &tf)) {
+                assert(false);
                 continue;
             }
         }
@@ -1882,7 +1911,9 @@
         // We'd better have a sane, sRGB-ish TF by now.
         // Other non-Bad TFs would be fine, but we know we've only ever tried to fit sRGBish;
         // anything else is just some accident of math and the way we pun tf.g as a type flag.
+        // fit_nonlinear() should guarantee this.
         if (sRGBish != classify(tf)) {
+            assert(false);
             continue;
         }
 
@@ -1893,7 +1924,9 @@
         //
         // We've kept tf and tf_inv in sync above, but we can't guarantee that tf is
         // invertible, so re-verify that here (and use the new inverse for testing).
+        // fit_nonlinear() should guarantee this.
         if (!skcms_TransferFunction_invert(&tf, &tf_inv)) {
+            assert(false);
             continue;
         }