I wanted something to protect my Cardputer when I carry it in my jacket pocket. Buttons, power switch and SD card are all accessible on the back without removing the device from the case bottom as well as the USB-C port on the right (the speaker and Grove port are covered).

The top is plain so there's plenty of room to emboss/deboss a logo of your choosing. I'm currently using an M5STACK logo from the roll of tape they included in the shipment. :)

The case has 0.4mm of clearance around the periphery of the device based on their nominal dimensions. The top has 0.1mm clearance for the friction-fit with the bottom. This worked well for my device/filament/printer. Let me know if this doesn't work for you and I'll consider doing other clearances.

I printed mine in PET-G using 2 walls, 3 top/bottom layers, 15% gyroid infill and 0.2mm layer height.