Re: Hurc and BEC
If the CC bec is already attached to the ESC, you can bet the ESC already has the internal BEC disconnected or worse, it could be the the internal BEC was damaged by the previous owner and the CC bec added(?)
Either way, I agree with Black. Too much bec is harmless. I would just use the set-up the way it is. Still, verify that the internal bec is disconnected. just in case.