November Update: The stairway (not fancy...very basic) is completed and can be found by simply heading south and to "0" after entering the mining world from the rising spawn. I have completed the south, north and east tunnels to 2500. Enjoy the exposed ores and easy access to the edge of the mining world! The best way to access the tunnels is the three by three tunnel surrounding the spawn with the individual tunnels leading each direction from there. I will update this thread after more tunnels are completed.