Thanks, I actually think i read this article back when it first came out. I think I will give it a read again. Thanks.
Update: I went back and tried with your Google search params, I noticed it was the first and pretty much only relevant link on there (except for something by chromatic which I have bookmarked for after the kids are in bed). Maybe I should start looking for info about the perl C code, and just transpose it to Perl?
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