Thanks for all the info, - got stuck in bad weather last night and behind an accident that closed the highway for hours with no way off, got home and the morning paper was already there :( so I'm off to a slow start.
I will send a message to Randy @ best converter, but it sounds like smkettner's details on how they 'guess' gives me what I was looking for. Of course it's going to be much better than what I have now and I guess the manufactures are saying the extra cost for dual circuits and remote sensing (hey even better car alternators have that) is not justified. Fair enough.
If I learn anything significant more I'll pass it back.
