OK, here it is. Dont tell anyone my secret! lol
I just used one of the mounts that came with the camera. the 3m backing is some of the sturdiest around. I have a tracking beakon that is attached to it in the event it falls off during flight. I was, however, thinking of using some small bolts on the cg and making an aluminum frame that sits off the body to help reduce vibration. but for now, i fly with the mount on and accationally try to get some video. I could just as easy reinforce under the mount to stiffen it up as well.
Slowing the video down in editing programs smooth it out alot though!