Stations are in the adjacent rail blocks, and we usually fit 4 double rows of factories inside each block, often rounded up/down to produce a full number of blue belts. Some attempts were made at a city block design on the top left, but the complexity of SE space science recipes made it easier to just extend each main belt. Next time, we’ll migrate red and green science to dedicated belt systems (which can already be seen in the lower left of the map), and add black and blue science packs into the mix!