i'll check out and answer your questions in the AM, but thnks for the input, meantime, I have to put in some practice on the silent guitar - Oh, and put in a few more pages of Churchill's; "History of the English Speaking Peoples", heck is that heavy reading!.
Meantime, you'll find me, in the highviz yellow, 2nd. pic. down, sitting on top of my loco: "Dolgarrog", in the group photo here.