Thomas,
There were only two of us flying them here in Salt Lake City. We did travel to contest during the seventies and eighties. I still have plans for the seventy size Challengers. If you want a set send me you address and I can mail a set to you.
Gordy
We did use the small one for speed limit Combat. And also had one for slow combat,it had the fuse. and stab and Elevator and Rudder on suction but used the big wing but no planking.