I see that there was R1a in Baltic area before Corded Ware as per the last paper about ancient Estonian results (and the authors, if I remember correctly, stated that R1 subclades were already present together in the area before Corded Ware expansion). But now, I'm not that sure that R-M269 was an EHG lineage. Probably, it was WHG in the direction of EHG. I remember to have read by Chad Rohlfsen months ago that another paper about Ukrainian neolithic is yet to come... and it will contain - as Chad said - many R-M269 and R-L23 samples. Still waiting for that paper....