DIY is to make your own stations The 2nd column is single item 1-4 trains with 4 belts, 8 belts and 16 belts. The 3rd column is 1-4 trains, with each wagon having a single (potentially different) item, one for 8 belts total and one for 16 belts total The 4th column is 1-4 trains, where each wagon can take more than a single item.