Is that just a drill out of holes(s) in s arm and bolting on with 2-56 bolt? Just have never seen it done, but my opportunities are limited.

Attachment will be directly above hinge, it was the angle being off 90 degrees (6-8) that was the concern.
Location is outboard due to making the rudder cutout larger due to a folding problem and material availability restraint. The plans http://www.spadtothebone.com/SPAD/ultraspadstick/ use 2 std servos for the elevator.

I really appreciate the time that you fellas take to share your knowledge even if it is going in a SPAD. If I don't learn here, I won't learn locally.(Poco Espanol para mi!)