Filament Colorizer - For big permanent markers

This thing is a filament colorizer, you have to feed 1.7mm PLA white or natural in. And it will be able to print colored objects without any pre-colored filament.

This model is for big permanent markers and is especially made for the PrinterBot Extruders, you can easily add it on, because of the arch and groove.

I also included a normal version for other 3D printers.

See an article about it here: http://reprap.org/wiki/Coloring_filament

The design may have some flaws, sorry for that.