Project Kepler
thingiverse
Make the motor tube and motor retainer a infill of 100% and have the rest of the parts at 0% infill. Even the though the motor retainer and motor tube have 4 holes I suggest you only use 2 screws to attach the motor retainer. You do not have to use supports but it would be recommended.
Download Model from thingiverse
With this file you will be able to print Project Kepler 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 Project Kepler.