KickStand,
Welcome to our nightmare, dillusional sickness, black hole, and so on. Your Avistar is a great aerobatic plane just waiting to bloom. Remove the stock ailerons and replace them with some 2 inch aileron stock. Make the inside 14 inches on each side flaps. You will have 4 servos in the wing. Use KLET plastic hinges and pin them with tooth picks. This will make a good solid platform that will allow you to wring her out. Short field take offs and landings will be easily accomplished. Your Avistar will perform like never before! Good luck.