LeapFrog Creatr Extruder Modifications for NinjaFlex Rubber Filament

Most extruders won't print flexible filaments like NinjaFlex and you need to modify the drive mechanism before you can print. The creatr's extruder is basically a modified MK8 extruder, but most of the spring loaded extruders on thingiverse won't fit a Creatr or they don't properly contain flexible filament. I worked with engineers from NinjaFlex to modify my Creatr with a spring loaded extruder drive mechanism and it works awesome.
Printer settings:
Speed: 30 mm/s
Temperature: 220C

See instructions tab for details
Enjoy!

8/9/2014 - added step file for the whole assembly per user request