Hobbimaster, your set up is very nice! That looks like the new E-Maxx. I have the BK Warrior controller 12020. A single line would be nice and much easier. Can the warrior be converted to a single line?
My batteries are lined up in series like your drawing.
Yes, it the new Maxx. Is there any way you can post pics of your wiring/ESC? I'm not familuar with the 12020. I looked at some pics of it on the net, but all seem to have one set of motor wires, and one set of power leads.