It's not as bad as it looks, Greg!
Essentially there is only one wire to every block on the layout. (For return power I used one common bus wire.) The power from the two cabs is assigned through a double pole, double throw switch per block. If you go slowly, wiring one thread after the other, it's not complicated at all. But of course, all this sums finally up to quite a bunch of wires. And at the first moment this really looks frightening
!
BTW: You see that I used multicolored wires. I got them dirt cheap from a telephone company - a very thick multistrand cable (about 20 ft, 48 threads in the cable) was more than enough to wire the whole layout!
I only bought some soft, flexible wire for the connection across the hinges of the boards. (These are the white bundles.) The rest is stiff and doesn't need to move after it is installed. All wires are soldered to simple terminal strips. They are barely visible along the left edge of the picture at right.
Ron