jr digital servos
 

I have some JR 8511 digital servos that oscillate about the center/neutral point.

I have tried all sorts of things, 4.8v, 6 v, short leads etc etc but I can not get rid of the oscillation. Under load they are fine, and I fly with them without any troubles, but the oscillation annoys the hell out of me !

My question is : is there anything I can do to get rid of this oscillation ? Can they be serviced to eliminate this problem ?

Any other suggestions please ?