Not sure about the "best" method Justin, 217F is current , didn't see
anything quite close  @ IPC's scriptures ;
seen somebody from T-cubed here on Net latelee, otherwise you may check ;
http://www.masterpromotion.com/links1.htm
free calculus download is :
http://www.relexsoftware.com/download.asp

this is Werner's patch, being an ex Bell fellow on this line .

humble servant                       paul

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