Gridfinity trays for IBM Selectric typeball elements

Gridfinity holder for IBM Selectric typeballs. Print in your usual settings and materials; I used PLA, you can sub PETG if your typewriter is in a really hot place for some reason. The typeball holders were modeled after the original cases they were sold in, so any Selectric typeball should fit right on and be very stable. The trays are 1u high (7mm) with a Gridfinity base allowing them to stack on top of other bins. The 1x2x1 is especially good for stacking. I'm not very good at Fusion and so only with great effort was I able to produce these two models. If you have way more typeballs that you'd like to hold, I can try to whip up larger formats.