SnakeBite extruder for 3mm 3D printing filament

This is an experimental, high mechanical force 3mm filament driver to push the filament into the hot-end of a 3D printer. It uses counter-rotating 6-32 nuts to drive the filament.
Video of operation here:
http://vimeo.com/87940579
Update: IT WORKS! It will need some tweaking...
http://vimeo.com/89471876
http://vimeo.com/89471877
Here it is on a large print: http://vimeo.com/89872411