And here is the basic shapes in place.
Soon as copper PC ties arrived from Fast Tracks I started laying code 55 rails.
The tightest curves are 3" radius and the grade is about 4.5%. The Porter will turn this sharp, but will need a longer drawbar to it's tender. The Porter doesn't have compensation in it's chassis so I will run the Plymouths only on this layout.
Here is a quick video of the 7 ton Plymouth giving the layout a spin:
Since I want to keep things looking "Eastern" I guess it will be a coal hauler with a truck dump and bin at the top and a very small processing plant at the bottom.