It doesn't do 60 - 2, but check out my web site: http://www.myvine.com/~jhlh It should be easy to take my code as a starting point and add functionality to detect the missing teeth. JW _______________________________________________ Diy_efi mailing list Diy_efi at diy-efi.org http://www.diy-efi.org/mailman/listinfo/diy_efi