Rhino
myminifactory
I downloaded a rhino model that wasn't solid or printable, so I used MeshMixer to edit it. This free program allowed me to fill in holes, smooth out the mesh, and make some adjustments with a brush. I also made sure all details were at least 1 mm thick. Additionally, I uploaded the color model in a zip file. The original file can be found here: http://archive3d.net/?a=download&id=6f77cd41 and http://www.3dwp.nl.
Download Model from myminifactory
With this file you will be able to print Rhino with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Rhino.