I created a case for my Logitech MX Mechanical, that it is safe in my bag, when I go to the office.

There is also a version for the mini-size of the Logitech MX Mechanical: https://makerworld.com/en/models/43177#profileId-44264

This version is without back, which will need less print time and also less filament.

Holes are made for 6x3mm neodym magnets, needs some superglue.