I picked up a pair of Atlas 40' steel PFE reefers... great models... except that on my O-42 Gargraves curves, the wheels scrape and drag against the underframe braces.
This really surprised me, since they're supposed to be O-36 minimum radius. I wound up clipping off the outermost braces to fix the problem, but why would Atlas advertise these as O-36 when the wheels will not roll freely even on O-42?