Can't start Dangerous Science Thread - Old Good STALKER Evolution mod for S.T.A.L.K.E.R. Shadow of Chernobyl

Hello. I can't seem to start Dangerous Science quest.

1. With Chuck I drank the zombification potion and found Figa in Yantar;

2. Afterwards I found Figa's stash in Bar;

3. Found the O-21 sample by the Compressor building (and destroyed it) but the documents that are supposed to be in the bus on the way to Yantar factory never appeared;

4. Asked Dead Stalker in X-18 for information;

5. I currently have no task in my PDA (KPK) regarding this.

6. I gave Svoboda's Lukash the scalp of the supercontroller and got the location of the entrance to secret Subway rail system.

I have OGSE 0.6.9.3 final 2.11 build 4248, clean install with new game. From what I remember from my previous play of patch 2.10, the documents that opened the line to finding Radioman's stash and the special detector for Dark Zones should appear in the box that's in the very front of the bus on the road to Yantar factory after I found Figa's stash.

Am I doing something wrong?

PS> Regarding the bug when Guide blocks the entrance to Yantar scientists bunker, I still have it, although SimplyYuri stated it was removed in latest patch version in some other thread here. The guy is constantly trying to get out which blocks the inner door from opening. It helps if I save and reload when I'm in the airlock because Guide apparently spawns just next to the door and then goes at it trying to get out.

As an addendum: Epifantsev never appeared in Yantar scientist bunker. Could this be the issue?