Compact 2/3 Axis GoPro / SJCAM Gimbal

This is an attempt to design as compact as possible 3 axis brushless gimbal for SJCAM and gopro cameras.

Gimbal is designed with RCTimer GBM2804 motors in mind and targets (with the current frame mount) a flamewheel like frame with 37mm spacing between top and bottom plates.

To keep the gimbal as compact as possible the rev around Z axis is quite limited but it should be enough to smooth out yaw movements.

I did a test print and setup - with SJ4000 there's a problem with balance (sho