#88
Not sure I could cope with a full underground system! It took us all night to dig that far and that was only 1 block wide.
We did work out a good digging technique to dig a passage way 1 block wide by 2 blocks high:
-One person stands and one crouches (with the couched person in front)
-The crouched person mines the lower block and picks up the rocks as they fall
- The stood person mines the top block and deals with putting up torches as you go.
Also we managed to sort out the iron issue, we now have over 200 ingots.