Convertible Deck Box Customiser

This is a customisable deck box. Print 2 of them and the 2 halves will clip together. During play the top half can be used as a discard tray.

Update: I've added a panel to support the side tabs for taller boxes. I found that they were too flexible otherwise.

NOTES:
1) This is a work in progress so please let me know if you think you can make some improvements
2) There is no padding added to the deck dimensions so make sure you add your desired spacing when customising, especially for the deck_depth parameter (reality does not quite seem to match the maths :) )