[Mike_Brace]

Thanks for all the kind comments. I must say at times I do find these a little difficult to write especially at the end of a day (often the only time available) and always worry I may miss a relevant bit of info or tip. The great thing though is that there are quite a few of you on here who have quite a lot of knowledge and I know I can rely on you do add to what I have written and so provide further help for those tackling these jobs for the first time.

Mike