What goes in the centers? Is this going to be a duck-under to the center section, or will this will be for scenery? You may want to plan for three access hatches in the center.
Yes I was planning on doing scenery in the three circular areas. A town to the left of the center reverse loop and a mountain with a waterfall going into a lake with a park at the bottom on the right side. Then on the bottom I was thinking some sort of RR industry, but I left it blank since that's probably the last area I would work on.
And Dave that looks great, certainly seems to be less and less to worry about with all these tweaks.