Stackable minimal cassette tape rack, wall-mount

A modification of a design I made. This version includes a tongue and a groove so you can slot prints together. It slots in tight, so it might be difficult to remove once they are together (I haven't tried to separate them). I recommend printing it in PETG and to be honest it probably needs some sort of backing for rigidity because it's a precarious tower at this point. But, that's for you to figure out. The hold seems pretty strong, I was able to fully load the rack with cassettes and hold the racks horizontally on only one side of the racks and they did not remotely come apart so at least it has that going for it.