I got tired of buying and returning mice to find the right shape, so I 3D printed a testing kit with the 8most common mouse shapes
EDIT: thanks for the response! For updates and other info: https://www.instagram.com/stratum.techart/
A while back I realized I'd bought and returned more mice than I'd like to admit, just trying to figure out which shape actually fit my hand. Online reviews and shape databases helped narrow it down, but you still don't really know until you hold one. So I started 3D printing instead of buying. What I ended up with: 8 hollow shells, each modeled after one of the most common mouse shape archetypes (compact fingertip, long flat shells, palm-rests, asymmetric wedges, etc.). Each shell opens with a bayonet-style twist mechanism, and inside there's room for up to 4 weight chips (10g each, so up to +40g) to simulate heavier mice on the same shape. The idea is to isolate the two variables that matter most — geometry and weight — without buying and returning six mice to figure out your preference. Once you land on a shape you like, there's a guide (made it as a little web app, QR code on a keychain that comes with the kit) that links straight to Eloshapes filtered to the closest-matching mice currently on the market — so the result stays useful even as new mice come out. This is just a personal project, called Stratum — mostly wanted to share the idea/process. Happy to answer questions about the printing, or the bayonet mechanism if useful to anyone else trying something similar.