EMD GP40X (GP40 prototype)These are N scale 3D printable files for the EMD GP40X (GP40 Prototype) in EMD demonstrator markings as EMD 433A the same one of a kind locomotive as the ICG 3075 (also available from Out of the Box Models), but represented here in its original configuration as EMD's own testbed during its active development and demonstration career, before its sale to the Illinois Central Gulf. This locomotive began its life as a standard EMD GP35, selected by EMD as