The original three-section set was given to me by Alain Kap.
I rebuilt it heavily, adding more tracks and new turnout controls, adding a fourth section to extend the siding. Three more in-between sections will be built shortly so that 20ft-trains can pass each other. Can be set up from three to seven segments long. Has a long elevator track plus interchange and stub tracks. Track and turnouts are Peco code75, operated via Bluepoint switch controllers and HOfine handles.