This is a fan mount I made for my Asus Tinker board. It allows you to mount a Sunon 17x17x3mm (UF3H3-700, UF3H3-500, UF3H3-710 V2) to the stock heatsink of the Tinker Board. I went with this fan over a normal 20mm for the fact most Pi cases I find that it will fit in won't allow a normal 20mm fan.
It's designed to friction fit over the heatsink, and I used spare servo screws to mount the fan. The screw holes are 1.5mm so they should work with just about any small screw that fit the fan holes and can self thread into plastic or wood.
0.4mm nozzle with default 0.15mm Prusa layers