I have Tower Hobbies TS 70's in the tail (133oz of torque each). One for each elevator half. I have them in right underneath the stabalizer. I cut out the plywood that the servos fit. Then I made another piece of plywood that the servos will fit into so its strong. It works good, and gives my more tail weight for 3D. I'll post a picture on Friday. I won't be home till Friday. I like this better then the other way. The rudder is fine.