It is recommended to print with support so that the teeth can be printed correctly.
The support should come off fairly easy depending on your slicer/settings.
Infill: If you plan on having repetitive use it is recommended to use 100% infill..
Cost per unit based on a 2.2lb spool at $17.00
60% infill: $0.37
100% infill: $0.46
Slicing Errors: It has been reported that some slicers do not correctly slice UBO. This will be fixed if possible. If you are having issues please try the "KiriMoto" app located under that apps section of UBO or download MatterControl.
As most of my 3D files it started as a 2D Drawing.
2D to 3D
From there I like to use the "Image Converter" feature on MatterControl.
(There are several websites/software to get the same result)
Lastly I used 123D Design/Meshmixer to edit and refine the 3D creation!