The side pieces fit into the base and should be secured by hot glue or adhesive.
24x12_set.*.svg : A full print set of the pieces needed to make a rack on a 24x12 inch piece of material.
base.*.svg : The base piece. Has holes enough for 4 slots.
side.*.svg : The side piece. Fits into the holes in the base. Has slots cut out for better airflow.