I keep seeing the gp extra wont 3d, Hogwash..
I have a BME 50 on mine an I have done elevators and harriers (wings do rock some) the wall, some hovering and it will torque roll in the right hands. I have done waterfall flips, and high alpha knife edge. True the DP has slightly bigger control surfaces and may well 3d a bit better I dont know but it is no lighter, and not as good looking (IMO). The hardest thing in doing 3d with my GP extra is controlling the torque of the bme 50