Heres an update...Going up...
I have been working on the tunnel to the surface, and I was wondering if it should be taller... It just means it would be more realistic and more work for me, along with less bricks to work with when building the land masses and stations.
Another view:
A service tunnel:
And the incredibly long strip of yellow decals on those tiny little decal bricks that took a whole day to place and I still need to do the other side:
Please rate (still keep in mind anything I may have previously posted about the construction.)