Thanks RCKen. What do you think about which engine I should go with. Like I said before I really like the O.S., but I am willing to go with a Saito as well since everyone here talks so good about them. I do want the engine to strong enough to pull the plane around and be able to get enough heat to get good smoke. That being the reason I am woundering if I should go with a bigger engine, if the bigger one would produce more heat or not.