Just got back from flying the new Stinger II. All I can say is WOW! This thing freakin moves! I have an 11x6 on it and it's fast. The engine doesn't have enuf power to do vertical very well but it still powers it nicely. The ending weight ended up being 5.46lbs. I set my CG alittle nose heavy because I didn't want to add any more weight to it. But the CG line only moved 1/16" from factory recommended. It flies great and will do anything an acro is made to do. Snap rolls are incredible, knife edges are beautiful, ect... I think alittle more power would give it that sweet spot, like a 12x6 spinning at the same RPM I am now.

Hope this helps you make a decision.