[Whyteboar]

Thanks all, I thought I had at least a clue as to what I was doing but obviously I didn't know how much I didn't know. It would have really helped had I started this testing before the snow flew, but that's the price of my foolishness. Back to the attic with me!
I think more reading is in order. It will take a few days for the roof to be safe again anyway.

Thanks again guys, for pointing out not only the obvious that I overlooked but 'edumacating' me as well.

Be well,

Craig