This was suggested to me buy an EE and race car builder, whose wiring was really amazing, I have to give him that. His suggestion was to use one, or maybe two, main junctions for grounding everything, that way if there was a problem with ground, well, you know right where to look! It *sounds* like a good idea. I didn't do it, I was just too far along and I wasn't convinced I should change horses in midstream. I'd also never read this in any of the half a dozen or so wiring books I've got. Does anybody actually do this? Is it a good idea?