The locomotive is a version inspired to tunneling loco by italian company Valente.
This model was printed with my small resin 3D printer.
The model is very simple (typical of these machines also in reality) and inexpensive, thanks to the Kato 11-103 4 Wheel Chassis engine.
The final model (some details have been improved in the final version) is for sale on my Shapeways online shop: http://shpws.me/I8sx
@Shapeways online shop: