Donjara/Ponjan tile racks

These are tile racks for playing Donjara/Ponjan (a simplified version of Riichi Mahjong), inspired by the tile racks included with "Donjara NEO". You can connect 4 of them in a square to have a frame around the play area, or use them separately.

I wanted to try playing Donjara, but I didn't want to import a new expensive version, so I picked an old secondhand one ("Doubutsu Ponjan 7") and printed these tile racks.

The tiles I have are 15mm x 20mm x 8mm. By adjusting parameters in the scad file, you could make it work with other tiles. (The code isn't very robust to adjustments, so you'll need to do some additional work if you change the size more than a little.) With the given dimensions, you can print one tile rack diagonally on a 220x220 print bed (eg. Ender 3.)