The Top Flite Gold Edition kits tend to build heavy. I am thinking that yours weighting at 9 t0 10 pounds is just about correct, maybe even a little on the lite side. As far as servo's, I used Futaba Standard servo's on mine. Anything less than standard servo's, in my opinion would not be enough. The nylon tubes for the aileron's might be able to be replaced with Sullivan cable. As far as engine and prop, I would think that Bax would be an excellent source for information and I would run with what he says. The Corsair is a great flying plane. For landing's, it must be flown to the runway with quarter power and have the power cut over the runway threshold so to eliminate the chance of a stall. For take off, the plane needs speed to fly. Keep it on the ground as long as possible prior to lift off. You will be happy when you get her rebuilt and in the air. Good Luck Dave