Hey IL-RC
The servo in front below is hooked up to the retractable tailwheel with a carbon pushrod. This servo is y-harnessed to the servo in front of the tank, which actuates he air valve for the main retracts. The servo with the big double sided arm is my rudder servo and also controls the tailwheel steering. If the the tailwheel is retracted the pull-pull lines are slack and there is no steering of the tailwheel. The whole set up works just fantastic, better than what I expected. The ground handling is on of the best I had with any of my many airplanes.