Just for the record, Jim Martin and the Banshee placed 3rd at the 1971 US Nationals and 11th at the 1973 World F3A Championships ( Gorizia, Italy)

As stated the model used an HP 61 (no pipe), Pro Line radio and Rhom Air retracts. A guy in my Club had one back then which flew well the only problem being occasional aileron flutter. The plans showed inset ailerons driven by torque rods. Rhom Air used to sell these especially for the Banshee. Today you would obviously use a seperate small servo for each aileron.