Here is my GoPro mount design for the Shendrones Squirt V2/V2.1 Cinewhoop. This camera mount used the same geometry as stock GoPro Mounts, so all types of GoPro cameras are compatible with this mount. This mount is designed with a rear belt that holds the backside of the mount to the top plate in addition to the two front screws.
This mount is designed to be printed out of TPU or other flexible filaments with the backside on the print bed, removing the need for any support material. The part is in the correct print orientation if the teardrop hole on the left side is pointing up.
In addition to the stock M3 button head screws from the drone and a GoPro thumb knob, a M5 hex nut or acorn/cap nut is required to finish the mount.
To attach the mount to the drone:
Remove the drone's top plate
Slide the mount onto the top plate, through the rear belt on the mount
Reinstall the top plate with the 2 forward screws going through the holes in the mount before threading into frame's standoffs