wow, that seems very complicated for just unloading and smelting....
the main idea was a huge factory complex and a lot of self-sustaining resource outposts.
the factory itself was planed with a star-shape in mind, with the major transportation routes in the centre but a lot of room for expansion at the outer edges.
or i could make a system like in tributs of panem, with several specialised districts while the main district gets all the fancy stuff.
logistics could be a problem here.
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Also the trick with unloading is to use buffers.
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the boxes were my next step as well, i have tried the belt solution at first because the belts need no energy to run.
it works with faster belts but only to a specific point.