Great stuff, thanks for sharing it. I basically logged in only to post this. The pre-Slavic people in the Oka-Volga region would have been abt 15 percent East Eurasian on average, some as low as 10 pct and others as high as 20 pct.

These two Cumans/Polovets (?) were really Mongoloid. My model for Central Asians

Target: RUS_Vladimir_7:SHK002__AD_1179
Distance: 0.0219% / 0.02187894
49.9 MNG_Ulaanzuukh_Slab_Grave
32.7 KAZ_Aktogai_MLBA
10.7 IRN_Tepe_Hissar_C
3.0 TUR_Kaman-Kalehoyuk_MLBA
2.6 CHN_Yellow_River_LN
1.1 Levant_Megiddo_MLBA

Target: RUS_Vladimir_7:SHK001__AD_1207
Distance: 0.0278% / 0.02782209
44.8 MNG_Ulaanzuukh_Slab_Grave
38.5 KAZ_Aktogai_MLBA
9.2 RUS_Krasnoyarsk_BA
6.7 IRN_Tepe_Hissar_C
0.8 TUR_Kaman-Kalehoyuk_MLBA