Due to the nature of this model, I recomend that you use te follow settings in your printer:
Maybe you shoud use very fine sandpaper to polish the tamper surface.
The tamper is 51 mm in diameter. You should scale it if you need a different diameter The stl models are divided in two files to allow printing in a 200x200 bed
I'm adding 3d modeling formats in case you want to edit the model.
This model was designed in Sketchup and converted to 3ds and obj... using the buit-in sketchup converter. Rendering program is Maxwell free plug-in. Materials added to a single folder. Textures in model from Sketchup library Diferent parts of the model (steering wheel, lights, tires and wheels, wing mirrors, seats, etc.) are compiled in components and grouped in one single model.
This model is offered as it is