Old topic but kind a helpful for those struggling with this. There is my setup, it gives full movements with no interferense with tail servo arm.
Not ideal so i am still finding the way to simplify it with only one elevator servoarm. After taking a pic i have moved links to outer holes on lever to get larger movement on servo.
One solution is to rotate tail and elevator servos 180 degrees but the tailrod is too short then and currently i dont have longer. This woud be the best way I think. I post a pic then..
I went to small servo wheel solution as well. Gives full travel with no interference.
Raptor50 and Raptor90