Just to clarify, (since I mistakenly believed this mod might have just ported textures from SA without regards to the licensing)

The mod creates new round- and conical-flask textures for sciences that don't exist in those respective flask forms/shapes?

I assume the SA/round-flask textures were lifted from the FFF as a texture base, and color shifted to the best-matching color for each respective Vanilla science, thus creating a "complete" set of SA/round-flask textures for all sciences when playing SA.

Vice versa, textures for Vanilla/conical-flasks were created in colors most closely matching those respective sciences in SA, to also complete the set.

That being said, isn't there technically an explicit/direct (as opposed to optional) dependancy for SA anyway, since 2.0 has no use for the SA-science colors in conical-flask form? Outside of say, another mod introducing more sciences?

The reason it's optional, if I'm remembering correctly, is that the round-flask variants are compatible with 2.0 without Space Age, and the "nostalgia mode" toggle for the conical-flask variant is only applicable to Space Age.

That being said, attempting to load the game with only Base and this mod enabled results in a game load failure, so that doesn't appear to be functionally possible right now.

Sick. Ill make an effort to fix that sometime early this week