Designed a case to hold the Orange Pi Zero 2, a 30x30x8mm 5v fan, and integrated and elevated mount for stock wifi/bluetooth antenna. I had some rubber, pull through feet I used, hence the base variant with large-ish holes. Included a variant without holes for adhesive style feet (or if printed solid, you can drill holes and mount how you prefer).
The base is 1.8mm thick for stability, while the walls are 1.2mm thick. The top case snaps in place. I used a total of eight 2.5mm screws, all 4mm long, 4 to hold the fan guard in place and 4 to hold the OPi to the base. The wifi/BT antenna presses into the tower to give better separation from the board while staying inside the case. The fan was purchased from amazon and came as a 4 pack for ~$10. It is snuggly fit into the little right-angle features on the top and bottom halves.
Running a headless debian w/ homebridge server installed, the little 5v fan blowing across the stick-on heatsinks that came with it, this runs at 42°-45° C and it is near silent with the rubber feet helping to isolate any vibrations.
I printed this on a prusa mini+ with a 0.4mm nozzle and used a generic brand of ABS with CF (80% x 20%) with no supports or issues. The total plastic used was about 33g.
The lighting in the camera pics is poor and really accentuates the layer lines, even though they feel barely noticeable to the touch.
STEP files included for your remixing pleasure
The author marked this model as their own original creation.