Mine was scratch built by a good friend about 15 years ago It's been a great airplane, I did the test flight when it was new and on wheels...Throttle servo went out, had to fly around until it ran out of fuel..Tried loops, rolls, etc trying to kill the engine, my first G62 conversion..It flew around for about 20 minutes, wouldn't die...He might still have plans, I can call him tomorrow..It made the cover of High Flight and RC Report the same month, years ago...Re powered it with a Zenoah twin this year, takes off way quicker....