Mitch sure has smooth running trains!
I have spent the last couple of weeks doing wiring. There are three main power feeds for: track, switches, and signals/lighting and uncoupling/unloading (UCS) tracks. A fourth main wire serves as a ground. The track is fed about every three feet or so and each siding has its own power supply. The 15 switches use the independent voltage plug to supply a constant voltage. The 6 semaphores use insulated track sections to indicate occupied tracks and the block signals are connected to the switches to show turnout position. Separate power is used for the operating barrel loader, coal loader and log loader. There will be two ZW transformers.
I have five insulated rail sections for operation of the road crossing devices like flashing cross bucks, crossing gates. banjo signal, and gateman house.
A couple more days will be needed to finish most of the wiring. 
