I built the stinger 40 and I can tell you with all confidence that if you can takeoff, land and get yourself out of a little trouble every now and then, a stinger is the way to go. This plane is very forgiving flying slow , with no tendency to tip stall. I put a magnum .46 with Pitts up front and this plane would vertical until it ran out of fuel if I was to let it. The recommended throws are right on for slow flight or burning holes in the sky! The only problems I had was the wing saddle needs beefing up, and it finishes nose heavy. It was my second plane after I became bored with the trainer. I am also building the 120 now with a 25cc engine. I've got tired of the gunk all over the plane to. Good luck!