When I was working on the design, the location where I positioned the original track was a guess. My guess was the distance between the edge of the table and the edge of the roadbed (as indicated in this image) would be about 1 3/4".
Will you please measure this distance? If it's much more than 1 3/4", adjustments to the plan are needed.
In this picture, there is also another configuration for the switch yard that may allow more room for a switching locomotive to navigate around.
SCARM file is also attached.