It seems that most agree a deep cycle bat is best for the house and a cranking bat for cranking. It seems like most also agree that when the battery switch is moved to 1&2, the batteries instantly equalize. My question is wouldn't that make the cranking battery experience substantial cycling? I realize it wouldn't be going from 100% to 0% and back like the house bat might but isn't 100% to 50% more of a cycle than a cranking bat is expected to handle? If a deep cycle has plenty of cranking amps to crank the engine, could it be better to use deep cycles only?