A model is coming up for the AAR 3 bay offset hopper in TT and it's been made clear to me that the similar hoppers owned by ERIE, NKP etc are quite different from an AAR 3 bay offset hopper.
Wondering if anyone knows the differences. The NKP ones seem to have odd placement of side supports but the ERIE ones look very alike to my untrained eye.
I also understand the 'alternate' or Advisory Mechanical Committee / Mechanical Advisory Committee ? design was used by a few other RRs that weren't part of the Van Sweringen grouping.
