Good to see the creative juices are flowing Mark. I would recommend that if you want to add operating accessories, figure out where they will go first. They take up a lot more space than you think. I like the multiple lines also. Gives you a place to showcase your collection and someplace to "play". A point to point with industries may be a good way to include the accessories you want. Maybe add a by-pass siding or two on the main lines so that you can have multiple trains ready to go.
Looking forward to more updates.
Bob
