Hello Longshore
Just some points to consider.
Reversing trains may not be important or of interest to you but if so:
So far you have two train loops, two trains going the same direction or two trains in the opposite directions or one in each direction on one track or the other. But to change directions of a train you most remove the trains from the track or you have to run a diesel engine that can go in both directions and using your switches, move that engine from the front of the train to the other end and live with the caboose or the observation car of a passenger car at the front end of the train behind the engine.
All that to say it may be nice to have a way to reverse the trains in your loop. To be able to reverse a train you would need an S shaped spur that intersects the inside loop and this would allow reversing a train one direction forward and the other direction backing up the train. That is why my layouts basic track plan is an oval and figure 8 allowing reversing in each direction. Just pointing some things to think about.
Charlie
