@Robert Cushman posted:I’m using 0-106 outer
0-99 inner loop.
Nice choice. The one I'm working on is 49.5" Radius (O-99) and 54" Radius (O-108). It's a double-track/double-lap oval. Trying to work in the switching portion. The layout area is 24'6" by 11'6" with a narrow section on one end. The switching branch is 36" Radius (O-72) for four-axle diesels and freight cars of 60' or less, though my six-axle MTH diesels with scale wheels can handle it.