Yeah, the facing is only done by effing around with them. I find it a lot of fun, actually, to see the various configurations you can make. One quick tip, in case you haven’t stumbled on it is, once you get your configuration set, if you hold Shift down, and click on each trench so they are all lit, you can move the whole thing wherever you want using Move command.
As for memory issues....wait, what was I talking about?