I am a beginner, I'm re-covering a trainer I bought used per RCKen's method of covering (Barbie if you're keeping track). I reinstalled CA hinges per advice on these forums, all good, and the ailerons were moving well and freely before covering. Post-sealing the hinges with Ultracote, the hinges are moving freely, and I took care not to "bind" them either direction by not allowing the the covering to limit their movement, but they are definately stiffer than they were without sealing with coating. I can move the ailerons up and down fairly easily using the pushrod from the one aileron servo, but I just wondered how much the servos might be hindered by the extra resistance. Are servos fairly strong in terms of leverage? Keep in mind this a a trainer, by no means a 3-D plane.