I love this modular case design and use it for lots of things. Recently upgraded my mouse and figured I'd make a case for it since I travel daily with it.
The inserts are TPU and printed in gyroid infill (5-10%), with 0 top surfaces so that the gyroid acts as a squishy padding for the mouse. It fits really well and I'm happy with how it turned out!
The screws needed are M3x20
The author remixed this model.
Modified to have TPU inserts for the Logitech G502 wireless mouse