Mooner's J-tripper Extruder

First off, thanks to Airtripper for a great compact extruder design!

This is my J-tripper -- a remix to the Airtripper design to allow for DIRECT mounting of a J-head (or similarlly slotted hot end) to the bottom of the Airtripper direct-drive extruder. I made this design to replace the finicky parts that I encountered on the Mk 7 / QUBD extruder designs.

I built mine using a Makerbot MK7 Drive Gear.

Visit http://airtripper.com/?p=367 for extruder body build details.

Once the extrude