I'm working on a double-track mockup. But, if Turtle wants doubles, he's gonna have to drop me a small chest of iron blocks, 'cause that's an awful lot of iron. I mean, 10,000 to 15,000 x 2 rails is a few rails. I can't cover even half of a single line, let alone 2 full-length lines. And, I really do think a double line is gonna look a lot nicer.