Geared Nema 11 Extruder 1.75 mm J-Head

This is a remix of Wild Bill's PG35l extruder design. I really like the extruder design, but I had problems with the PG35l motor. I wanted to adapt the design to use a geared nema 11 motor. So for works pretty great and the retraction is great at high acceleration. Utilizes a 27:1 ratio motor from phidgets.com here: http://www.phidgets.com/products.php?category=23&product_id=3321_0.
The idler is the same as the one in Wild Bill's design. If you have any questions please let me know. This