Thanks El_printerino for the great model! I just wanted to make a spacer that would hold things in place for vertical storage without relying on putting cardboard/punchboard under the trays. This file slots over the top once you'd added the boards (in the specific order/pattern shown) and holds everything where it needs to be to stop things spilling out.
All other files to print the insert are in the original design.

My print in the photos is hashed as I print without tops/bottoms/walls to save on filament.