I installed a Futaba 9253 high speed digital servo on the rudder of my 1/4 scale Hangar 9 Cap 232. Eventually, I would like to add a gyro. My problem is that the servo oscillates at a high speed at neutral position. Under a load and while in transit it's fine. It's as if the big rudder and pull-pull linkage are springy enough for it to never get a real lock on where it should be. Is this a common problem with lightning fast servos? Futaba's latest ad lists the 9253 as a good choice for heli tail rotor or rudder on a fixed wing. Any suggestions? I sure like the speed and power on that big rudder. Thanks --Jim