I realize there are flange-less metal wheels on various applications. Most I've seen have been located in-between flanged wheel sets, not in the leading or trailing position. My concern is with the overall length of the 4 axle wheel assembly when it navigates over a turnout. The plastic wheels are flange-less which prevents them from binding between the rails. This would imply the wheels ride off of the rails a bit to allow the flanged wheels to freely roll through the turn. If the plastic wheels were replaced with metal ones, would they ride far enough off of the rails to possibly contact the center rail on a turnout? If they were located in-between the flanged wheels, I wouldn't be concerned. I guess I'll have to try the metal ones?
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