One final quick question Jim and then I will get on with the Segmentology work and leave you in peace…………. I think I understand the mechanics involved around the snp , cM and mismatch bundle limit controls. If we lower the water level for a match you significantly increase the probability of an IBC event. However, is this still true for first cousin matches, which are already confirmed IBD. Are there issues in the measuring process of the DNA which will be carried forward at lower levels, even with first cousins? What I am thinking is whether I could ‘safely’ drop the limits to some level 300snps, 3cM (FTDNA record 2cM ‘matches’ ) between a one on one comparison between two first cousins and create a ‘better’ framework of close in family segments. Then add the triangulated segments from other ‘unknown’ matches at a reasonable match criteria 700snps, or 7cM (or higher, I believe a 12cM match criteria would be around 95% confidence in IBD). Am I adding noise or extra detail between first cousins is the question? I was thinking of going higher on a match criteria initially in the ‘unknown’ triangulation kits and see what the initial framework looked like for crossovers and then introduce more triangulated kits at a lower match criteria over time. Always moving from a position of near certainty (as much as we can), or is this a bit over the top !!