[gregebowman]

In my first game playing SEIVG, I built both a sphere world and a ring world. It does take time, but if you're playing single player, then you have all the time in the world (assuming the AI isn't kicking your butt by the time you can actually build one). But since then, I haven't stuck to a single game long enough to get that far. There are so many mods to play, and I just don't have the time anymore to play them all.