Pastruder (Direct Drive) Concept

Update: RichRap has finally come up with a workable solution to this, albeit with little volume, using a belt and a common-sized syringe, see http://www.thingiverse.com/thing:20733

Because not everyone has an air compressor lying around, or wants to deal with the issues that stem from trying to control a non-newtonian fluid/suspension/colloid using force, especially with air compressibility effects, http://www.thingiverse.com/thing:1143

The current design is intended to make use of the oft