Aaron,
I have attached a color coded diagram of the plan in blocks of ~10-12 feet for DCS wiring. The easiest way with FasTrack is to add-in a 1 3/8" where you the blocks to begin and end and pull the jumper wire on the center rail wire. That provides an connection point for each new block and separates the previous.
You need the center rail broken. The outside rails can be contiguous common or U.
It is easier to have yards connected, but parked engines receiving power and DCS signal will have the hour meter and maintenance timer running. Gunrunnerjohn came up with a way to put a yard on a toggle switch for power on/off and keep the DCS watchdog signal simultaneously.
The left or west side is a natural for the reverse loop. The right side a little tighter to decide a route.
