Brendy and JimmyC,
I've just re-read my apology and cannot understand anyone accusing me of being pissed off - which I most assuredly was not !! - unless some people are only too ready to jump down other people's throats and look for reasons where there are none.
As for not adding anything to the thread, how is it possible to add something to the discussion of a topic about which you have already confessed your ignorance by asking the question in the first place?
People's expectations of me are occasionally too high.
Conán