Talk to me about batteries! I've read through the threads about Rolls, Deka, etc, and in one thread it seemed to indicate one bank was for cranking (both engines?), and the other bank were the house batteries. So deep cycle on one side, and cranking on the other... Is that correct? Or does each bank crank its own engine? I've got an 87, 63my with identical 4, 8 volt banks on each side. As always, advice is appreciated, Thanks