In the RPG mode when working on the Drone Suit project, I have three options but I can't figure out how to unlock the third. There's "Update Existing Designs" and "Develop In-House", but I can't figure out how to get the third to stop being "Think About It Some More"
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As far as I remember, you're supposed to read some books from the book store in order to get a chance for a new option. Some book about nanites and some other one (I think), but I don't remember which one specifically, so you can just try reading everything. Latex fetish must be at max level as well I think.
So, yeh, check the book store and latex fetish level.