I haven't decided whether to preorder one of these cars to sample or wait and see production models. I also wonder how high these will ride if made for 054 curves, and, if too high, whether that can can be corrected. In response to the original poster, here is a sample of scale 89 foot cars on 072 curves. These are Atlas TOFC flats rated for 072 minimum in three rail. Mine are modified with body-mounted Kadees:
