as a teenager some 40 plus years ago, my best buddy's dad, a TV repairman, built a few Heathkit radio systems. I remember that one was an 8 channel, which at that time was incredible having that many channels. he put that radio n a seaplane that had a 9 foot wingspan. I also remember another kit he built, that went into a Kaos, IFRC. that plane was fun to watch him fly I remember him doing all sorts of body English moves as struggled to keep up with the plane's incredibly quick maneuvers !.