Yo! it is PETG and took a lotttt of trial and error. I'll be uploading all of the STLs at some point cause I wanna make this open source. The very top is only 0.5 mm thick, with the little slits to help make it bend per button. It has little standoffs on the bottom so that it sits juuuust right above the buttons, so that it barely needs to bend to actually press them. It works surprisingly well if you can tune it just right!
