Here's a full-length clip of me flying the ParkZone Sukhoi XP. I'm using the GWS 5043 prop and a Hyperion CX 180 mAh battery. With this battery mounted over the first cooling hole, the CG is @ 40mm, which seems to be a good setting for hovering, harriers, flat-spins, and tumbling maneuvers. I would have shortened the clip, but I wanted to show the power it has with this setup over the course of a longer flight. My flight-timer is set for 8 minutes. You'll see that there is plenty of power left at the end of the flight.