That Thread was great! I went through the entire thing, and I think I'm going to go with the GP 40 Extra...

I want to get a good 4-stroke for it, but I don't know which one would be best... if you put a .91 4 stroke in it, is it much harder to fly than if there was a .70 4 stroke in it? What about the YS .63 4 stroke... I'm looking for the best performace
Thanks,
Briann