Installed Roll Servo and Pitch Servo. No real difficulty except probably could have moved the pitch servo bracket one more rivet forward which would have allowed the servo to be attached with the arm toward the rear of the bracket. However, servo arm moves well and allows for full travel of the control stick so no issues there. Will wait for final adjustment of rid ends when the tail is re-attached and I can adjust elevator travel to match up. All in all I am very happy about how easy they were to install.