I'm surprised no one has mentioned the OS 1.08 FSR. I've been using one for over a year in my CG Ultimate and I would rate this motor one of the best I've ever owned. It's a really good match for this plane. Unlimited vertical, (in fact, you can do vertical snaps and it keeps going) outstanding reliability, easy to operate. The plane weighs 8.6 lbs and I'm using an APC 15x6 prop, running Power Master 15%.