ANSI Keycap Storage - Stackable

[ Jan 21; update ] Printed a few sets, flaws detected, see below. Photos to follow.

This is a work in progress, I'm curious to your opinion.

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This is original work based on inspiration by the work by (MatthewRobo)[https://www.thingiverse.com/thing:3160774];
Instead of two parts to glue and two separate trays, I recreated the trays in OpenSCAD
as a stackable design.
The SCAD file should provide ample customization options.

The parts are
- "alpha1" for the left side of the keyboard
- "alpha2" for the right side
- "navnum" for navigation and number keys
- "extras" for all-sorts
- "cover" as a simple lid.

Printing a tower for multiple keycap sets?
You will probably only need 1 cover ;)