Has anyone had any issues with the retract tail gear? I have followed the instructions and noticed you need a strong hi torque servo to retract it. The retract horn on mine bent mainly it has no problems with retracting up but extending down is where the issue is. the horn on the retract binds/bends and don't retract down. Am I doing something wrong? or is there something I need to do for easier retracting? here is a photo of the bent horn.