Rail Power Products B23-7 shell, Atlas B30-7 cab and Athearn U33B drive with Details West reservoirs and Smokey Valley FB-2 sideframes. This model was originally painted as Southern B23-7 4003 before being rebuilt and repainted as a Burlington Northern B30-7AB. It was finally painted in Norfolk Southern black as SOU 3973.

With the arrival of some decorated Atlas B23-7 shells, 3D printed noses and frames, I was able to retire this locomotive to the dead line and scrap it for parts.