[benfranklin]

[ QUOTE ]
I expect this has been asked before but I'd be grateful for your advice on <u>current</u> material available whether book, forum post or internet article <u>on the above subject</u> . I reckon I have the basics but one item on the fundamentals wouldn't do any harm.

Thanks in advance guys for useful responses.

[/ QUOTE ]

It has been asked before, about once a week since the dawn of time. Read the forum. Every time you ask the same old question, fewer and fewer people who know respond, and you miss the good information that is already here.