pretty sure the 7955 is only rated to operate at 6.0v and its operating speed is .15 seconds with 333 in/oz of operating torque. you could go with a 7950 which is what i run. it is rated to run at 7.4v and has a operating speed of .13 seconds with 486 in/oz of torque. the 7950 is the best standard size servo that hitec makes. i rarely stall mine and have only broken it twice. stripped the gears doing stupid hill climb jumps. id go with the 7950 on the front and send in the 7955 to hitec for repair, usually free just pay shipping, and use it on the rear.