Hi,
I had a Mach 1 in 1976-1977. My plane had a Rossi 60 with pipe and Goldberg rectractable landing gear. Radio used was EK-logictrol super pro 7 ch. I competed some with it, at age 16 1977 I was competing in Swedish F3A championship. Great fun. Here is a picture of my Mach 1. After this I built a Curare (designed by Hanno Prettner) that also flew beautifully, like Mach 1 did.
Greetings from Sweden!
Bo