The high copper cost of electronics and distance between ore fields forced me to build a large rail network. No possibility of finishing this using only belts!
I'm pretty happy with the central train station. It has a waiting area that can hold up to 5 trains, though I never saw more then 2 waiting at a time. The individual platforms are quite compact, much smaller than they'd be if they were independent stations. There's a separate area for my passenger train, which I kept fueled and loaded with extra walls and rails.
The copper area at the bottom is a little weird, because I built it to equalize track lengths. That turns out not to be necessary, when I re-enabled the obsolete original copper platform for testing, the trains had no difficulty finding the more distant platforms even when there was a train blocking the original platform, which had a shorter path length than the 2 new ones. Thus I could revise the track to eliminate the detour to the left.
Much of the rail network is single-track with passing blocks. The rail network is much, much bigger than anything I actually had to build in vanilla, and saving on track made sense. Besides, I wanted to explore an extensive single-track network, instead of my usual double-track network. This captured some of the feel of Railroad Tycoon, where placing passing blocks was a strategic decision. The high-traffic central area is all double track, but once rail leaves the core it's single track. It works surprisingly well, with relatively little waiting.