Tetris Modular Thing Shelves for Lovely Things

Should have been working, really, but I was contemplating thing-storage (I had basically run out of room), and drew these on 3D Builder in a doodly-day-dreamy sort of way.

These are designed to hold light-weight things, 3D prints, photos, Raspberry Pis. rockets, etc, and stack nicely as well. Outer box measurements are 70x70x70mm, inners are 63m63x70mm, and each shelf sports a number of strategically-placed 6mm screw holes.

Shapes included are J, L, S, Square, T and Z. I have not included an I-shape yet as a). it was too big for my printer bed, b). the quick two-parter I did in 3D Builder wasn't very strong, and c). it would score a Tetris and all the shelves and ornaments in that line could disappear.