Originally Posted by Heliport
There's enough expertise on this forum to answer his question.
Indeed, H, but (as you're well aware), you can often get conflictory or confusing opinions from different self-appointed 'experts' on this forum. It takes time to work out which experts know what they are talking about and which 'experts' don't.
Better to go straight to the source, I reckon. FleaBay might turn up cheaper copies (if 20 quid is too steep for Chesty).