I agree with Randy. I've been running the LiFe's with Futaba 9650, 3150, and 3102 servos. The manufacturers are pretty much always going to error on the safe side recommending not exceeding the voltage ratings of the servos, so I'm not surprised to see the answers from Futaba and Horizon. As I said, I've had no issues, and as Randy said, if it makes you feel better, use a regulator.