John, Your thought process reminds me of a framed Thos Edison quotation which I kept above my desk @ work- "There's a way to do it better, FIND IT". In the area of YDNA test interpretations, you sound like another Thos Edison. I think you hit on something. Comparison of your modified & unmodified Genetic Distance tables appears to tighten up (reduce Genetic Distances [GD's] in the following areas: (1) 134747/135160 reduced from 1 to 0, the 2 Thos (MD)'s appear to be identical (2) 133184/53335 appear to be identical. 160254 appears to also be a descendant of the same Wm[GA]. I didn't have his ancestor listed. (3) 134088 (James W.) now appears to be identical with the other 2 James W's 134024/134403 (4) Closer match between Thos (MD) & Chas (1740), Wm (GA), James W. & James, SC (5) " " " Wm (GA) & Thos (MD), Chas (1740) & James (SC) (6) " " " Chas (1740) & Thos (MD), Am (GA) & Jame M. This is all based on a cursory comparison. Jack T.