I'm using the original ZeroW Raspberry case with octoprint installed to control the mini and check on my prints. I was looking for a place to mount the raspberry and came up with this solution where it is out of the way and easily detachable.

I used a premade mount for the zeroW (can't find the source anymore) and modelled a base around it which fits perfectly on the side panel.

I attached a view from the inside of the printer, just print the stl file and put it in place. If you want to change the angle or design your own mount you can use the scad and additional stl file.

Prusa

I3 MK3S

Doesn't Matter

Yes

0.2mm

30% Gyroid