I still have the Mambo I built in 1967 when I was 12 or 13. It survived because I never got a transmitter for the Ace receiver and Bonner S/N escapement. I flew it twice as a free flight, and it so terrified me that I never put it to risk again. Same can not be said for the Falcon 56 that started with 3 channels of a 1970 Orbit. First flight was going so great that I landed it. The third flight was completely solo, thanks to an unknown modeler at the old Beech field in Wichita. The Falcon lasted about 75 flights until the balsa wing spar decided that was enough.