I tried the extra shim and it seemed to make the sesaw a little worse. Then i tried it with one shim per side. That did the same thing. Two shims per side has had the best result but it still has the wobble/ sesaw thing going on. I was looking at the servos and the one on the left side( looking at it if you were standing behind it) the arm was centered was alot higher than the other two. I tried to adjust the arm on the gears but it is either higher or lower than center. Could that be the problem?