I decided to try mounting my GoPro to an arm attached to the bottom of my Phantom. I wanted to see the Phantom in flight. The first flight, GoPro in its case, was not good. I did a ground loop as there was too much weight on the end of the arm. I adjusted the arm length, by moving it inward and added a little counter balance on the other side. The Phantom sat level on the ground. It took off and flew nicely. It did go slower when flying backwards.