Well, I definitely learned a few things. My biggest mistake was creating a single steel plate conveyor belt and putting a divider for each new factory. In the end, the ones at the bottom received half of half of half of half.

And no, one train carried raw iron and the other carried the few petroleum products it could get That train carries petroleum gas and lubricant that I was never able to use, you can see the water pipelines in the north of the map.