rob, i know how to use ailevators. i currently use this for my edge with dual elevator servos. with this plane, i got the centers and endpoints the same, but was unable to get the travel identical until i got the linkages identical. maybe the 9C is not as good as the 9Z in getting this the same.
i was thinking maybe the difference in servo location from one side to the other and the other geometry difference allows the servos to move the same.
i am making too much out of this difference??