EMD GP40X (GP40 prototype) ICG ServiceThese are N scale 3D printable files for the EMD GP40X (GP40 Prototype) in Illinois Central Gulf markings as ICG 3075 one of the most historically significant and unique single locomotives in American diesel history, and not to be confused with the entirely different production GP40 2 successor that EMD later marketed under the GP40X designation. This locomotive began its life as a standard EMD GP35, one of EMD's 2,500 horsepower road switchers of the