Hi Bob, I only see one 67 test posted. Is that yours? Where is the match posted? I would really like to get this chart saved so that I could add some color to it to better see the numbers within the group that don't match, and to see if they are the faster changing markers. Highlighting the markers that are different makes it much easier to really see what doesn't match. It is my understanding that if the faster moving markers are the ones that don't match, then the difference isn't that critical. Ida ************************************** See what's free at http://www.aol.com.