4s with an external bec? Good to know. I've been thermaled on 2s running a 5700 2 pole. Looking for ways to handle this 5700 motor a little better. Last few runs went very well, even a 3s run.
Still wondering about addint a cap... Should it be discharged first? I have one that's been out of use for five years. It's most likely naturally discharged by now.