this is the first brushless gimbal i designed and built. i hope it will be a useful add-on for filming. it should reduce the shakiness substantially. the gimbal relies on some of the cheapest components i could find for this project.
adjusting the pid controller was a pain at first. i am still uncertain whether or not the settings are at an optimum or not.

files and instructions can be found here:
http://www.thingiverse.com/thing:257240

here are a few videos of the gimbal in action: