Snail, take it to thread it comes out of if you want a scrap. I have too much to do to be scrabbling round finding stuff from days of yore. That's homework I can do without. I've spent yonks already today looking up stuff from Richard Bridge that turned out to be irrelevant bollox from the past. I forget stuff in a heartbeat. Stick a post in the relevant thread, why don't you. Not here. Fer chrissake, not here. If you dichotomise, I may well lobotomise.