Here are the servos I am using:
http://horizon.hobbyshopnow.com/prod...p?prod=JRPS811

After further testing.. I noticed that the tighter things got.. the more it would shake. If I unscrew the screw that holds the servo arm.. it does not do it (I guess b/c it has some play). It basically starts happening the more throw I put into it and the less play that is in the linkages. As far as throw.. whether it is out on the arm and part way in on the horn.. or.. in on the horn and part way out on the arm. The more throw.. the worse it gets.

I also noticed that it is the actual servo causing the problem. It is like it is trying to correct back and forth real fast. It does not happen near as bad if I put the trims way to the right or the left and have it start out of center and then flick the stick. The vibration does not stop.. I tested that too. I flicked it and it just keeps going.. Is this a sucky servo.. or.. bad servo? I was told that these were supposed to be pretty good little servos.