Got a couple of Atlas Gunderson Auto Racks -- one 2-rail in BNSF and one 3-rail in UP.
Both sit at the same height on the end sills, which I've noticed with other Atlas cars. Both have appropriate sized wheels (28"), but the 3-rail car has larger flanges which appear to be smaller than those on the standard sized wheels. I will probably install Kadees on the 3-rail car. I did notice that the 2-rail car has additional air line detailing which is a nice touch. Atlas continues to amaze.
Though some of my associates have gone crazy buying these cars en masse, I won't be getting more. They're here to fill out the collection a bit.