For all you SPF owner's, here is the long awaited, much anticipated, never expected, SPF GT40 Owner's Manual. Much of what is in here is already posted elsewhere but this has some new info and it's all in one download PDF.
http://gt40s.com/images/howto/LynnMiner/Reference/SPFGTMANUAL.PDF
http://gt40s.com/images/howto/LynnMiner/Reference/SPFGTMANUAL.PDF