Was forced to get Ganns book out to prove the memory chips have not over dosed on UV. The problem was due to the bolt coming out of the left outboard elevator hinge. Howards explanation in the book says 'Unporting is the balance destruction of the elevators by aerodynamic force. ----- if enough seperation between the fixed and balance portion of your elevator occurs, your airplane will go into a vertical dive -----' My take is they are talking of the onset of flutter bought about by the outer one third of the elevator span being unsupported - which is where the issue of speed and C of G would enter (lift demanded of the elevator). Any aerodynamisists out there?