Great mod, love the expanded science stuff, but some of the tech is in need of a reorganization. As the title says, the tech that unlocks science pack 3 is indeed after a tech that requires science pack 3, along with other questionable choices. If you want, I can help you troubleshoot the tech tree. Again, great work.

Thanks for the trying the mod out, and the compliment & heads-up! I saw this issue from a forum post as well, so it's on my list of stuff to do. I'm sorry I haven't had time to go through everything, as the early game is proving a very tough nut to crack. I would indeed appreciate comments, advice, problem notes, etc. about the tech tree, since my original construction has clearly left it quote broken :/