Thanks Ewenn,
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This is really helpful, as usual. It doesn't change my main takeaway from this dataset, which is that the initial R-Z18 thrust appears to have been as part of the Bell Beaker group into Denmark around 2300 BC. However, what it does do (via the R-CTS12023 and R-BY66533 reads) is firmly establish the TMRCA of the modern definition of R-Z18 as being before CGG106708 (2125-1947 BC). This dramatically limits the younger end of FTDNA's 2931-1727 BC and also limits on my most-recent estimate of 2623¨C1897 BC. I'll have to recompute some numbers...!
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Cheers,
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Iain.
