FWIW I would much rather be on the too wide side than too tight on this one. End spec's with KB's for me is .0303 and I run mine at .0031/.0032.
http://kb-silvolite.com/feature.php?action=read&F_id=40


Clean it, if it's Dirty. Oil it, if it Squeaks. But: Don't fix it, if it Works!