Hi all,
I have partially opened these drawings (my connection is slow) and I'm sure that what I have seen is a rearrangement of the drawings of the book of Voronin and Kolesnikov, the same that I have utilized as a main source for MiG-3 ad LaGG works.
DGM, you are right saying that the indication should take into account the factory.
However, the drawings of V+K show some example that was commonly interpreted as a versions succession, and is useful as a first approximation to be understood writing on this subject.
AR should know much more on this subject.
Massimo