Ultimaker Direct Extruder

This design has been superceded by Ron's Compact Extruder Mark II: http://www.thingiverse.com/thing:24219

This is Ron's Compact Extruder modified to sit on the Ultimaker's XY carriage. I haven't tested the max speed, but I am able to print at 100mm/s without any trouble. The main advantage is that by removing the Bowden tube from the extruder, there are fewer messy strings after each print.

Note: This version of RCX is a mirror image of the original. This allows the lightweight stepper mot