It's amazing the engineering and precision that is put in these servos. They are the size of little clear blue cheap 9g servos but these put out 75oz/in, are silly fast and precise. I put 2 in a 60 size classic pattern Bridi UFO on the ailerons. It's rock solid in roll. The centering is nothing short of perfect. It gave me an eerie feeling not requiring any roll corrections in calm air. I didn't touch the ailerons from takeoff to the turn into the pattern on several flights.