There is'nt a 1/4 scale warbird out there that requires that kind of servo torque. Unless you already have 8711's, your wasting your$$$ I still fly Ni-Cads in all my warbirds. They have'nt let me down in 20 years, no sense changing now. The great thing about Li-po's is they have brought the price of Ni-Cads down. I guess I'm just Old School.