Which he doesn't.
Now, I could have just made the modifications to the mesh which were part of the GOH program (chopping off marker lights in front, installing AC and replacing the straps with railings, etc.), but I figured if I'm overhauling it, I might as well go whole hog. All new dirty and oxidized stainless textures (the originals were modeled as brand new, here, it's about 6 years out of GOH), new route textures for 14 routes (circa 1995), updated advertising (though that's still ongoing), heck, I even pulled the handles off the route signs so nobody would mess with them except the conductor. Still a few things to do (got to pop the new wipers on), but it's rolling along...