Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4568162.

(My very first design!)

A case for Raspberry Pi 4B with a 25 MM Fan and a clamp to attach to a Go-Pro style mount. A link to a mount for the upright supports on a CR 10 is attached below.

This design is intended to be 100% friction fit. The first couple of prints I looked at for R-Pi all needed hardware. REALLY didn't want to go to the hardware store or wait several days for Amazon to deliver. (of course I did get a bolt assortment eventually). If you chose you can use M3-16s to attach the fan. The posts are the weakest element but the work if you don’t twist them.

Be careful on post production and not overdue and ruin the friction fit.

You will need to print 3 of the key blocks and 2-4 of the fan posts. Unless you are dialed in on your settings you might want to print them one at a time instead of batch.

The clamp for the CR10 V2/V3 upright is located here: https://www.thingiverse.com/thing:4568203

Watch the print in an Octolapse video here: https://youtu.be/qCqEPeU6B68