"Trilateral symmetry is a pain because you can’t rotate a raster image 120 degrees and not get lots of gross pixel-artifacts." I'm biting back so much trash talk right now.
(I got around this by building a symbol library of major architectural elements that I could push around and rotate to my heart's content, but, you know. Vector art. One trick you might want to borrow for trestles in the future; in Illustrator, you can create custom brushes (http://www.bittbox.com/illustrator/how-to-make-a-custom-illustrator-brush) to lay along a path.)
This is super useful, since I'm going to have to do a few more stations of my own later. It's cool seeing your working methods; I might have built a displacement map for the texture on the station, for example, but your tricks get a nice result too.
Neat stuff! ...Now I'm hoping that Falcon Mk II is a real thing we'll get to see in-game, though.
Ohhh, but you're a vector guy aren't you! Black magic, all that business. Can't be trusted!
(That brush tutorial is very cool, though man do I ever fear-hate Illustrator. I'll probably just ... keep doing it the hard way... )