Thanks again guys. I just took both batteries in for a full test and both are in really good shape for being older. Wanted to do that before the move so I'm not just pulling them out again in a short while.

I think for now, since I'm not really causing any harm, I'm going to run the setup as is until I need a new batt - then I'll get a more pro consultation and possibly swap in some new twins, etc.

Brian - My boat is still in a wintery cocoon for a while unfortunatley.