TO BEc or NOT TO BEc...not just for Patrick

[Sammus]

To run without significant load on the internal BEC you remove the +ve (red) wire from the ESC->Rx connector. This is the same connector you use to program the ESC with CastleLink.

I've always just assumed you need that +ve wire in place to program it, and always replace it before programming. I've never tried not doing it come to think of it - it could work.