Some planes will just not harrier well no matter how hard you try. I wouldn't blame your thumbs, certainly if you do well with another plane. I will say that even an unstable plane will have a sweet spot somewhere. Try increasing your angle of attack, if the nose is even a touch to low your gonna rock like crazy. You just have to search for it that much harder and it's twice as difficult to keep it there. As far as the spoilerons go, I agree that their usefull but not fool proof and probably not worth the hassle. I disabled mine too, they caused me to almost lose my plane when I forgot to turn them off. Good luck, once you achieve success you'll change airplanes one day then you'll go back and feel like your starting all over again.