The main grade around the outside of the yard has been established. Before this happened, a brick wall and walkway was installed next to the house and a short block wall was built at the base of the ivy covered fence to define a DMZ for the ivy.
The track that goes around the mountain is supported on a 4" wide block wall that also holds the mountain in place. This wall, and all other features of the layout, were placed by the numbers from the CAD files for the layout design. Everything fit as designed.