Maybe mines, being only 10 Ktons and containing no living beings, can travel via super-trans-warp drive or something like that. Or maybe they are placed in some sort of parallel universe where distances are different.
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Give me a scenario editor, or give me death! Pretty please???
well that its... i am going to toy with the idea of making mines an advanced research trait that costs 500 or 750 points to get access to mines and all layers and sweepers...