We have four of these flying at my club. Mine and another are powered with an OS .91 Surpass. Great combo, very scale like. Great flier. Another has a Saito 100, Even better flier with a LOT more power. These three wiegh in at just under 10 lbs all with on-board glow. The last one is powered by a G23 gas engine. What a PIG. You wouldn't even suspect they were the same planes unless some one told you. The Difference you ask? About three extra pounds between the weight of the G23 and ALL THE LEAD he had to add to the tail to get it balance. And yes, he moved servos and electroncs to the rear.