I was going to start cutting my Homasote for my roadbed, but it is extremely windy today, so I started working on the shelf part of my layout instead. I had to move the 18" metal wall brackets up 4 inches to get a match for the height of the roll around. Then I put stringers on the two I did and a fascia board on matched to the roll around. I could clamp the roll around to the stationary part, but it is fine for now with the brakes set. I think it is going to work pretty slick. Here are two photographs. My carpentry skills aren't very pretty nor is my used wood, but it all seems solid enough. I still need to put an 8 inch section between the wall and the tabletop, but that material is out in my shed, and I was afraid I may blow away. I thought the dog may fly like a kite at the end of her cable when I put her out. LOL