Jack,

         Thanks for the thoughts. No doubt a locked up elevator would result in a bad ending. I have the brackets  that tru trak provides for the servos that is designed to limit the servo travel avoiding the overcenter lockup situation you described. I removed it during installation and will reinstall it when final control rigging is complete. Did your servos not come with these brackets or are they a more recent addition?  I bought mine a couple of years ago.            Kai