So, I STILL haven't come up with any real ideas for how to decorate or get around on the big stairstep buildings, so I'm putting it off some more. What worked out well for the other two, and for the miners, was just running a main beltway alongside them, instead of directly connecting them, so I decided to keep going with that idea, and redo the little bit of beltwork I'd already done on the other side of the facility.
With that line built out all the way to the other big tubeway trunk, I was able to fully connect up the first building I built, with all the Iron and Copper machinery.
And, in fact, that finishes production for all of the intermediate items, and the belting to get them over to the final factory.
Aaaaaand fully-detailed out.
Interior shots.
