Sorry but your explaination just does not hold water. First I have flown airplanes that were very nose heavy. No roll stability issues. Aerodynamically there is just no possible connection unless he is fighting tip stall the entire time. Next false assumption is weight towards the top of the fuse on a low wing airplane. My Extra has close to 2 lbs of rx battery at the top front of the fuse and then carries a half gallon of fuel above the wing. I have also flown helicopters inverted where the entire aircraft weight is above rotor disk and it handled no different then being right side up.