Fort Pitt modular layout, eventually, every track joint was soldered. Gargraves track, Ross/or Gargraves switches. Each 6ft (length) module had at least one wire feed. Yard throat module, (pictured), with a Curtis Ross 4 way yard throat (turnout) switch.
For those using Ross switches, and Gargraves track, note that the pins (track joiners) are a slightly different size. IMO, enough difference, to degrade the electrical connection, at the track joint, (Eventually).