Many Thanks for taking the time to respond to my question.
I fully understand what Oxford Blue is saying. Somewhere amoungt these trees is a forest.
I haven't covered "Met" type things since my PPL (about 10 years ago) and I am sadly lacking any knowledge in that area, so I struggled to see the whole picture with respect to the question. I knew there was something relevant - just didn't know what!
Will always keep in mind that its one subject.
Checkboard - I don't follow your comment?
[Edit]Oh and Oxford Blue - yes I would be interested....[Edit]