Not an optimal setup. Heavily depends on the input - since I cannot place any more mines nearby, I cannot increase the input (copper & iron plates, 4 copper mines and 6 iron mines are running - not that much of a production anyway). The rocket & adv. circuit loops are 100% efficient as long as they have inputs. Smart inserter has some problems with circuits. I had to made everything (most stuff) symmetrical - don't ask
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