I have the Miss America. Installed a retract tailwheel in the scale location and rounded the bottom of the fues between the scoop and rudder post. There is a vertical bulkhead to mount the tailwheel on. I also used a elevator wire joiner to hide the linkage. The first Robart tailwheel broke, used a hobbico retract nosewheel. I first had a YS120 with a 16/8 3bladed prop. Then a Magnum 180. I looked at a couple of gas engines but settled on a OS160 which it has now. I have the revised retracts WM gave me at no charge. the weakest part is the gear mount so fix it before it cracks.