While working on the planet UI, I studied on how missile bases work (how much they cost, etc), and realized that in order to get this UI correctly working, I'll need to implement technologies first. Missile base's cost and maintanence relies on which shield, missile, armor, etc that you have, plus any minitaurization.
So I'm in progress of implementing technologies now. I've committed some large changes, which breaks the build. There's still a lot to be done, but for those who's interested, I've implemented how MoO 1 researches new technologies (investment, interest, and chance of discovering the tech). So if you want to see how it's done, check out my changes.
Hopefully within the week, I'll have a working technology system, then I'll finish up the planet UI. After that, it's ship designing and ship construction, plus colonizing new planets.