I crashed my trainer and it caused the rods from the ailerons [center servo] to bend and pull loose from the wing. It was easier to go to the two wing mounted servos than repair the original system. My plane did not have provisions for the servos in the center of the wings so I went to the furthest point of the wing sheeting about 1/4 of the wing and reinforced new servo mounts and it flew like a champ. Being a trainer I don't think the location of the servos is that critical especially since the original system worked from the end of the ailerons. If you choose to do this, make sure you use reinforcement under the skin.

Gary