Interlocking Card Tray - v2

As this model deviates further from the original, I thought I'd release a v2 of it to keep things separate.

Changes from the original model include a configurable horizontal and vertical interlock system. I'll tweak this one eventually to allow a configurable finger access dimension, but for me these trays already work pretty well now.

The top/bottom interlocking let's you stack the trays when not in use. If you print one and stop the print process at 2mm, you will get a piece to fit on to