Woj, what David is saying is exactly how I had the flaps set up on my last two Isobars. Simply program the MPX servo for about 180 degrees of throw (be CERTAIN you are not bottoming out internalyy as that is VERY bad, how do I know?) so that the pushrod is in-line with the servo arm for full down flap & full up flap. Therefore the fluttter (in the flaps up position) is resisted, as David said, mechanically, not by the servo's motion/force. The only limitation then is pushrod strength/stability or the servo case or the servo mounting. Its a REALLY solid way to do it.