The history of V1636 is clearly not well known at this point. Inb4 we have multiple case or revised case of it in a prehistoric context. It was in Progress, in Khvalynsk and in Late Kura-Araxes.
But the fact is, that we take R1b-Z2103 or R1b-V1636, and Late KA, or Hajji Firuz, or even Armi hypothesis, or Gutians / Anatolians, all from approximately the same time. It makes a lot of correlation with Steppe and Late Bronze Age South Caucasus. Did anybody compared the Armi Anatolian Names with the Gutian ones?
I also think and said it multiple times that Yamnaya is maybe not the exact proxy for Anatolians or even Tocharians, but maybe Catacombs and Poltavka respectively, are.