I designed this mount for my GWS 360 sail winch servo.
Hole spacing is 43.6mm (fits nicely onto the pulley adapter that comes with the servo) and the diameter of the holes are for M3 bolts.
GoPro Session is extremely snug, so snug that it's very difficult to get it in and out. I have printed this in PLA but only as a prototype. The intention is to print this in flexible filament such as TPU. I will add more photos when the TPU version has been printed and fitted to the servo.
FPV camera is the Foxeer HS1177 v2 from banggood and it simply slots into place.
I can easily adjust the model for other cameras if you like, just message me and I will get you to measure the camera dimensions.
Holes on the base and on the top are to allow screwdriver access through the print to get to the screw holding the base plate onto the servo.
Supports are needed EVERYWHERE not just on the build plate.