Extruder design
The extruder design that I am currently using is a Gregs/Wades style of geared extruders. These allow you to get more torque out of smaller motors. These type of extruders require more parts to be purchased in comparison to the normal direct drive bowden extruders.
You can find the one I used for my build here:
Body of Extruder
http://www.thingiverse.com/thing:60531
Parametric Herringbone Gear
http://www.thingiverse.com/thing:10707
Materials included in the description of the files.
You can find the one I used for my build here:
Body of Extruder
http://www.thingiverse.com/thing:60531
Parametric Herringbone Gear
http://www.thingiverse.com/thing:10707
Materials included in the description of the files.