Free 

This design is basically a mashup of two designs: RaspberryPi 4 Case for Prusa i3 MK2S and MK3 by mpkottawa https://www.thingiverse.com/thing:3952065 RaspberryPi3 Mk3 Case by agarajag https://www.thingiverse.com/thing:3004038
This enclosure makes it possible to mount a Rasperry Pi 4 with a heatsink with a fan (by GeeekPi on Amazon) on a Prusa i3 MK3.












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