ScottV posted:You said that some people use 2 plastic joiners at the ends of the track segment, while others use one. One on the center rail is all you need, with a switch connected to the center's power feed. I install a 2nd plastic joiner on an outer rail only if I need block occupancy detection for signals....
Uhh... if it's a passing siding that connects to the mainline on both ends, it needs two insulators. 
Remember the picture posted by the OP... Note that it connects to the mainline on both ends.
