Thanks NECrails for putting this in your save file. I think that I see what you mean about changing back over from inner to outer, but the idea is that a train will go through the reverse loop at the top of the mountain, and then will be able to use the cross-over to go back to the outer loop. Once the train is back on the outer loop, there is no route back to the inner. The idea is that a train will head into the yard and get broken up. I will look at it to see what is possible.
-Ken