I tried my Lionel mill gon with Atlas 100 ton roller bearing trucks on my 60" curve and had derailments as the truck hits the side of the car&won't let it turn as needed. I don't know how the 3 rail trucks work on 3 rail track as the trucks don't have much more swing than my 2 rail trucks do.
I don't care about having things down to "scale" I just want to get the car around curves & through switches without derailing. Lol.
Thanks for the input gentlemen.
Al Hummel