I generally accept any conclusions if there are no conflicting facts and opinions based on the actual materials that everyone can see on any issue. To clearly speak for myself on any issue, I need to be a witness to what happened in person (and this is not possible for WW2). To believe any (even the most experienced and respected researcher) only on the basis of his General story and the final conclusion for him, means to deprive yourself of the joy of going through the path of research on this topic yourself. If I unconditionally believed what You said, for example, in fact
"all committed suicide in Nov 44 prior NKVD arrival to the base as part of an inquiry into Tokarev's death", then I would deprive myself of the pleasure of even knowing their names and fates, and it would not be known to all participants who read this topic.
all awards and fate of Markin N.A.
https://pamyat-naroda.ru/heroes/kld-card_vmf3251804
all awards and fate of Goncharov V.T.
https://pamyat-naroda.ru/heroes/kld-card_vmf1703491
Of course, I cannot rule out that this is the same plane, but without an accurate understanding of the modification and number of General Tokarev's plane, it is very difficult to draw a final conclusion.
The inscription "For Stalin" could theoretically also be on the pilot's plane, which was usually navigated by NA Markin. Until September 1942, he served in the 4th squadron of the 2nd MTAP, and September 1941 there was one aircraft in the 2nd MTAP with such an inscription - this is the DB-3F of the flight commander, Lieutenant P.S. Skatova (died on this plane 09/17/1941)
Best regards,
Kirill