<snip> I like being able to use both batteries for
starting so I use bigass wires too. <snip>

Mark,

I thought the whole idea of using "small" wires to the secondary battery
is to limit current flow .... effectively providing a trickle charge to
the secondary and that using "BIG" wires could cause problems.

Of course, use of small wiring would necessitate giving yourself a jump
(with portable cables) to use both for starting.

Care to share your feelings on this?

Thanks,

Mike