Thanks to Pat145 (https://www.thingiverse.com/thing:4600728) and albnok (https://www.thingiverse.com/thing:4445361) for their original designs that served as inspiration or part of my final design.
I wanted something that wouldn't take up too much filament, would work for the base game and crossroads expansion, but that would also suit premium sleeves and vertical storage. Trays also lift straight out of the box onto the board, as shown in the images.

Print 2 each of both the 2 and 3 deck files, and 1 of everything else.

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