The walkway and pipe networks are complete. Here are some final details and images.
In the image above I have removed the walkway, leaving the bridge in place. The dark strips where the walkways were are made of sheet magnet I cut so size and glued in place.
Now I have turned the walkways on their side to expose the sheet magnet attached to the bottom.
This image is focus stacked for better viewing.
The last three images show detail and railcar placement from a perspective that wont be possible once the Power House is reinstalled in the blank plywood area in the foreground.
The connection hose for the second fuel tank car if needed.