Following on from the 3D printed GE 70 tonners I completed last year the next designs to fit the Rokuhan Shorty chassis were two different boxcab diesel shunters both designed by Stonysmith on Shapeways.
The first one was an American loco very similar to the Central New Jersey GE-Ingersol Rand loco now preserved at the Baltimore and Ohio museum and like the 70 tonners is designed to drop straight onto the Shorty chassis
There is no detail below solebar level and the windors are not open
The other contender is the rare British Thompson Houston Bo