About this 3D model

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 technique, I guess, but it seems to work ok. this is the motor I used: http://www.amazon.com/GrillPro-60013-Replacement-Rotisserie-Motor/dp/B0000E2RH5/ref=sr_1_14?s=lawn-garden&ie=UTF8&qid=1335204205&sr=1-14 and here's a video of what the assembled thing does: http://www.youtube.com/watch?v=B3HdGH-5dP4 I have this shown sitting on a countertop, but the bracket has a hexnut location so this can be mounted on a tripod. Here's a short clip of what the panning motion looks like: http://www.youtube.com/watch?v=VvkOrj_IyqA&feature=youtu.be