Hello everyone! I just bought KSP at Steam over the weekend, and I've been playing it for two days. In my first day, I successfully put a craft into orbit around Kerbin, and on my second day, I put a craft in orbit around Mun (but did not land), and successfully returned it to Kerbin. In the process, I have built, flown, and crashed more craft than I can count. I have a pretty good feel for the construction process and the orbital mechanics, and the interface (I have no problems with the navball). I have decided that I now have two main goals: build a permanent space station around Kerbin; and build a permanent station on Mun. So, my question is, where do I start? One thing I can't seem to find anywhere is how to build the modules to make them self-sustaining. Yes, I've seen the tutorials, but most of them skip over the details of module construction. Are there any sites or tutorials that can explain this? I'm looking more for the why and the what, and not just the how.