I think that Haakon got it right. I also found the tool useful. Sam From: "Haakon Styri" <styri@online.no> As far as I can judge the output, this is a useful tool, and the output is user friendly. Great work, Terry. It tells me the TMRCA of the closest match, but I wouldn't know which one of the close matches listed he would be. However. that's a minor issue I guess is easy to fix. My immediate question is: will you run an updated analysis if this tool motivates more people to test 67 STR markers? :-) H.Styri