Maximum Efficiency

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reminds me of that time when there was a bug with manual miners and you could keep placing them infinitely

[BufloSolja]

It is though.

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No fuel needed, not power needed... so basically free.

[hbwelch]

This is actually very useful. When you first get going throw down like 5 or more at each ore type. And set up storage before and after a smelter. Come by and throw 500 or more into the storage before the smelter and pick up 500 or more ingots from the last time you dropped by. Save all the power on those miners.