Hi Hoss, It's a fine looking plan, especially with the elevation changes! I have two observations; first, there is no way to reverse a locomotive. A reverse loop could be created at either of the places the spurs disappear into their tunnels by merging back into the main track. Second, possibly put a double crossover in place of the single crossover at the point closest to"N" on your compass rosette. This would allow one train to cover all points on both tracks of the mainline without having to throw any switches, just in case you wanted to do continuous running. Just my suggestion, I know everyone would not agree.