I really don'y know why everyone is thinking that a Saito 100 is to small for this plane. I can understand a larger engine for the high elevation guys but for the most part the Saito 100 is great. On CoolPower 30% Heli mine hovers two clicks past half and pulls out very nicely. It tips the scales at 8 lbs 8 ozs. The key is to get everything as far forward in the plane as you can. I mounted the Rx battery 6.0v 2000 mah, and throttle servo on teh firewall. The Rx is up against the fuel tank. I did use Dubro Super Lite Wheels. They shaved 2.1 oz off. NO PULL PULL on the rudder! It balances right at 7". I also used Hitec HS-475 Karbonite Servos. ( 1.41 oz) This is the best flying plane I have ever flown.