So, I was just outside (92°) under the MH looking at our battery tray. It looks like it WILL hold 4 batteries! Am I hallucinating? Did Thor actually do something that would make THINGS EASIER for us?? There are however a bunch of wires that will need to be tucked/pulled up out of the way. One being a large jacketed flexible conduit. It will take some "messin' about", but I should be able to do it myself. YAY!