The following PDF files reflect the current layout design. They were drawn by Dave Sommers.  Hope this helps with the understanding of the layout. You will need Adobe reader to open them. 

CSX SD70MAC #4709 in the dark future paint schme leads 2 units on K806 through the diamond at Darby, PA. Darby, PA is unique in that it has an active trolley line(SEPTA) crossing a Class 1 railroad(CSX).