ORIGINAL: MinnFlyer
Before you get too concerned, try this...
When the servo is buzzing, lightly touch the servo arm.
Pull it, push it, lift it, etc - all very lightly with one finger.
If the buzzing stops, don't worry about it. When the engine is running, the vibrations will do what your finger did.
Hey Minn, quick question, are you saying if I just litghtly touch the control arm near the servo(on the rudder servo and steering one and the buzz stops or it tends to stop on it's own randomly at neutral then I don't have a problem? If I use the controls and then let it go back to neutral I get the buzz and sometimes it will just sit there for 5 minutes or so and buzz just a little. I have tried disconnecting the rods and even then it will sometimes buzz although it usually quits within 5 seconds in that instance. I've played with the control rods and they don't seem to have much resistance at all. They pretty much buzz anywhere and everywhere when I move the control arms but it seems to move pretty easy and there really is no reason for it.