I tried this. Did not work for me unless I backed them out to where there was a visible gap. Also tried sanding out the hole where the servos sat in the fuse to make sure that the servo was utilizing the rubber graumet, getting rid of slop in linkage, and different servo arm. It only does it when on the highest throws on a large control surface (rudder really bad and a little on elevators). Pretty well known problem with the ds 811's especially with the ucd 60 rudder (on rcuniverse). Jr says it is fine as long as it stops when you touch it with your finger. I don't think this is good b/c I am seeing it get noticeably worse on elevators where there used to be no probs after very few flights (about 15). The hs5925 is all I could find in the range I was looking for on the rudder (no sign of ANY play or jitters). I am going to try to find something a little cheaper for the elevator. I just don't like the 811 servos. I think it may be the single ball bearing or the fact it is not coreless?

Are you using ds811's? Or.. experiencing the problem with another servo? I would be suprised if you don't have the problem on the rudder when doing max throws.