Reply to "American Models Pacific-type steam loco driving wheels"

I have used both scale and high rail locos and cars through S-helper switches with no problem at all.  The moving lever at the frog prevents derailments of scale equipment since there is no gap for the wheels to bridge.  Long cars with scale wheels are another matter. Early American Models scale length passenger cars with scale wheels will not negotiate the 20" radius curves of S-Helper switches.