Seems like the ESC/BEC are just not up to the task. I went with the CC BEC and it steps down the voltage from the 7.4 volt LiPo. My main concern is mechanical retracts may bind. Drawing power from the main pack causing major problems. This would have been a bad thing in the air. I would rather be safe than sorry. The Panther is running 7 servos which I felt was a bit much for the stock unit. My F-16 only uses 5 which I was comfortable with and have not issues so far. Its a judgement call by the owner. So far I've made the right calls and am flying and having a good time with no issues. Mike