Including myself my club has 5 St's and all of run the same setup on the tailwheel. We all used the tailwheel provided and have no problems. We used the pull pull rudder bolt with the servo in the rear, first we reduced the tension on the springs by stretching them and then secured them by wrapping them around the bolt and added a nut to make sure they stayed. The fellows that are flying the 110 used the stock tank with any any incident.