The beginnings
Instead of building on the ground (one is not getting any younger),
I decided to control my grade by building the outside 1:22.5 scale empire
up on outside lumber. I was able to control my grade so that the
maximum grade is 2%. The turns on either end are flat.
Here is the beginning of the work. About half of the lumber is
in place. The half circle on this end has a 10 foot diameter.