Mark"
How wide are your main line curves? I'm very glad for you that you have additional space! I'm trying to understand the drawing and space. Also, I don't like the yard in the middle of the layout. Too me it makes the rest of the layout look smaller, because the track is just circling the yard. Still, that may be the "best" option given the space. I do like the run and reverse at each "end." Maybe give the yard area some more thought?