thanks malc,
I have had a look at the original edition it seems - that link appears to be a newer version, briefly going over the first few pages it seems a lot clearer. I admit the original seemed to jump around quite a bit which made it hard to follow, it would seem to over explain some very basic concepts but then seeming to leap up some of the actual complex parts without much explanation.
I'll have a go at this one.
Cheers,
Rusty
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