This is a small test shell I made as a test for a larger project I want to tackle. It can hold two Sanwa (or similar) 30mm arcade buttons, and includes a small hole for any wires to run out of. I have yet to actually try making a functional controller out of it. (and really how many games can you play with just two buttons anyway? Besides Divekick, I can't think of too many!)

Anyways, the print takes about 30 grams of filament total, and the result is about the size of a standard light switch.