Summary

So this was my second project when I was a little better at things, still learning to slightly upscale things enough to compensate for shrinking since I am located in a cold basement. The thingi is a 3 axis brushless motor gimbal for a gopro hero 3 in the skeleton case. Movie!!
https://www.youtube.com/watch?v=LU4G0ZOkrPE

Instructions

Print Settings:
Fill - 0.8 Layer Height - 0.2

Motors:
2206-140Kv Brushless Gimbal Motor (x2) ~$30
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=43037

2804-210Kv Brushless Gimbal Motor (x1) ~$20
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=43040

The dimensions for the motors can be found on those sites.
They use M2's on one side and M3's on the other. I used M3 hardware and I think a #6-32 (?) for the skeleton case/pitch mount.

SimpleBGC Settings:

Pitch: P25 I0.3 D33 Power 175
Roll: P33 I0.2 D35 Power 225

I didn't get around to the yaw on this one because it turned out to be too big for the nose of the plane I want to put it in. These settings are high though since it is a decent size rig for a gopro. Mess around with the PID and Power until you get it. Here is a good guide: http://aerialpixels.com/support/alexmos-brushless-gimbal-controller-simplebgc-tuning-guide/

GoPro Hero 3 Skeleton Case Gimbal (3axis)