"Snoopy" is one of our older airplanes, and by far has the most hours put on it of any in our 32 years of flying. Originally built with a swept back trailing edge, it would do the flattest spin you ever saw....but was unrecoverable! It would flat spin right into the ground, we'd go get it fuel it up and fly it again! So we wound up building the wing as Joe Bridi intended the Sun-Fli 4 to be built---this one being the Sun-Fli 4-20----having a Supertigre 34 helicopter engine it is extremely nimble and very light. I wish the Kaos ARF would have been a Sun-Fli but wouldn't take much to modify it.