josepp, I don't know why you choose to misread or misrepresent what I posted. It was foolish of me, in hindsight, to post to a thread started by you. I've been around the block enough times that I ought to have known better. My apologies. Bruce and michealr, interesting discussion even with the distortions. Iffn you want to continue it in a thoughtful and cogent manner, pm.