@cabinet Bob posted:
If you look at the wheel on the left you can see a large gap from the flange to the web of the rail The wheel gauge is too tight In other words the wheels are too close to each other You can get away with it on tubular track or lionel fastrack but when you use Ross, Gargraves or Atlas it is a problem. Those trucks don't like the frogs, gaurd rail or crossovers. Forget about trying to traverse a double slip switch or a large switch like a number 6 or 7.5