I just saw your post while catching up on the Forum. I use the SuperSnap track and am very happy with it. Put O Gauge pins in all three rails except, obviously, where you want to create a block by putting a fibre pin in the center rail. Here is one tip to avoid chasing an electrical problem for hours like I did. In areas where you are creating a block or where a fibre pin is placed in a switch, or where there is a crossover and you want to keep the 2 loops isolated, it helps to break off the small metal connectors under the track because thay can create electrical continuity even when there is a fibre pin in place.
Ed