Recently bought A/F Polar Express set , made it a figure 8 layout (upstairs). Very enjoyable, love the Bluetooth app to run it with. Love the scale dimension the set offers. Great puller, excellent speed control, smoke that won't quit, and realistic sound, Tom Hanks.
Interesting though, Lionel lists the track at R20, it's the same as their 036 fastrack for O gauge, so they must be measuring from outside rail to outside rail on A/F where as O gauge is measured center rail to center rail.
Another interesting fact, since there is no center rail, it sounds different when running.
