The MOST filament extruder for making your own filament.
MOST SCAD libraries are required if the SCAD files are used. Put all SCAD files in the same directory. The renderer provides a relatively easy way to render the parts while still allowing the extruder library to be used in other designs.
Models of all the printed parts are available in the models/stl directory and pictures of the printed parts may be found in models/rendering.
Development of the electronics was done with Kicad and all source is available in the aptly named kicad directory. Gerbers are there, too.