to all the commenters about the tether idea, have a look at the Jab video, and where it would be if it let go and was just held by the tether.. its at the very rear most part of the aircraft, nothing but turbulent fresh air for it to hit. and secured to the rear most tie down point... yes its location was thought out.. same with the location of the hard mounts on ym Savannah. if the camera ever lets go, it wont hit any part of the airframe..
as for modifying aircraft, 19 rego amateur built experimental.. no probs!