This is a variant of my previous pi 3B+ case.

This one is set up to be used with my Prusa i3 Mk3+ for Octoprint.

So, holes are limited to:
power
camera cable/camera light switch wires
USB port
SD card

Prusa

i3 MK3

No

No

0.2mm Quality

15%

I glued a small fan to the inside of the grill top.

There are two small holes intended for countersunk M2.5 x10mm bolts to come through from Prusa frame and self tap into the case.

Before trying to mate the two halves just ease the edge of the holes very slightly to help the pegs in the base to get started.