Moineau Paste Extruder

The title of this Thing should be "Hypocycloidal - Schmidt - Moineau Paste Extruder", but that's a bit too long!
This design uses the Hypocycloidal Drive from these two Things: http://www.thingiverse.com/thing:79231 and http://www.thingiverse.com/thing:81879, couples with a modified version of the Scmidt Coupling here: http://www.thingiverse.com/thing:233667 and builds on the design of the Moineau Extruder here: http://www.thingiverse.com/thing:15538. The result is an extruder design driven with a NEMA14 stepper ready to mount on your X-carriage and try out.
See it in action here: http://youtu.be/KyuY_WrrCKw
TODO: Now that I have a working design, I need to try putting various materials through it. I have pumped yogurt just fine, but need to try more viscous (stiffer) materials.
** Here it is pumping Peanut Butter: http://youtu.be/4vtTN_aZ8iU
One problem to be solved is the leakage of material into the coupling chamber.
** Still a problem, but not over-doing the supply pr