I like the Raspberry Pi mount in https://www.printables.com/model/118058-prusa-mini-raspberry-pi-4-b-case-and-mount, but I already have the filament sensor holder (https://www.printables.com/model/24951-prusa-mini-filament-sensor-holder ) installed, which means the usb-c cable for providing raspberry pi power will block the sensor holder's movement, so I created a small modification for the mount arm.