Hello, first off, I just want to say your mod rocks, it really changed how I looked at system with not-quite-perfect planets, and in combination with Industrial Evolution this mod has really freshened the colony system for me!
Second, I just wanted to ask, how/where do you build Drone Control Nexus industry? I found this system I like a lot which unfortunately all have arid and desert planets but no cyrovolcanic or water planets, now the OP says you can only build in in a Station Market but I'm not sure what it is, and I'm not aware of any way to build a station (but I have orbital station in each of my planets). It'd be great if you elaborated this for me. Thanks in advance.
Also, is v4.0.0 save compatible from v3.0.4?