Originally Posted by TimBle

You don't want to be using those plastic bases any way. You can order some aluminium servo discs from RedwingRC.com.
Theirs have multiple drill patterns which should accomodate the pilot fibreglass horns. I think mos people bin those anyway and get Spot on, or Secraft, or Futaba aluminium horns

^ What he said

Ok I have 1232sg's all around on my Sbach 300. The problem that I am having is with my elevator servos, they will change where they are centering. Which is causing a deflection up or down by like 1/4 inch. I have 36in. extensions on them and they are not twisted so I'm wondering if this might be the cause. Oh and none of the other surfaces are changing. Help me please I want to maiden on Saturday

Just for the masses I'm using a hitec A9 and the op9 receiver.

Twisted extensions don't do anything for us except look neat, so that's not your problem.

Try different servos in the elevator channels on the Rx.