GoPro auto-panning rig using a cheap rotisserie motor

I wanted a rig to pan my GoPro camera while my band is playing gigs, so came up with this set of things to do that using a cheap rotisserie motor. I wasn't sure about the motion geometry, so I just put a bunch of holes everywhere so I could try to discover a good combination that would be smooth and give me the range of motion I could live with. Some of the holes may be a little tight... I just drive the m3 bolts in and out until the plastic conforms to the threads. Kind of a cheater techniq