RE: Multiple servos for elevator?
A suggestion on the instalation of your 2 elevator servos. When installing the clevises in the two elevator halves, etc. Make sure everything is exactly the same on both sides. This might seem like common sense but I didnt even think about it on one of my planes and the clevises are not exactly the same on both sides. Now the extreme end of the throws doesnt equal exactly on both sides and I have to go back and fix it because the plane rolls slightly with full elevator.
Maybe common sense, but it doesnt hurt to keep that in mind.
I used the servo reversor, its a little expensive but easy to work with.