Lulzbot TAZ Dual Extruder mod

My design of a dual extruder mod for the Lulzbot TAZ. This puts the budaschnozzles as close as possible (40mm center to center). and nearly all of the build platform is accessible to both extruders, once you alter the firmware for extra y travel.

originally discussed here: http://forum.lulzbot.com/viewtopic.php?f=16&t=66

UPDATE 6-25-2013: added a supported version of the motor moved extruder. just cut the support away after you print (thanks to lulzbots design for the help with the support)