K8200 / 3drag GT2 belt extruder

A simple way to change to belt extrusion for less noise and reduced wear. Includes a printable 80 tooth GT2 pulley.
openSCAD parametric cad file included. Can be used to change number of teeth.
Based on this very nice pulleys library:
http://www.thingiverse.com/thing:16627
UPDATE: There was a version posted with no holes and a thin back wall. It didn't work well since it flexed too much. It has now been removed. Thanks to turbotommi for testing.

UPDATE 14/01: RobotDigg chan