Cameron,
yes, I should have said shelves - or a deck that is shaped like the renderings or a floor layout.
You should be able to come up through the access into the room based on a previous drawing that you posted showing the entrance space.
I read your first post again or maybe the second where you mentioned your early thoughts on what you wanted the layout to do.
Passengers need two places, freight needs two or three and the trains need care and feeding. That was my reasons for some of the building placements.
The height settings are 30" in the 3D versions that I made. You may have to go to 24" -26" to get enough clearance for the train height.
If you build this borrowing elements from the L-girder style, the pieces could all be fabricated downstairs and screwed together upstairs. You may only need a couple of legs per peninsula if you deck with 3/4" plywood.
You can also run the MTS in 3D and rotate the view while it's running.
