MakingBot replicator 2x flexible extruders

This is a replicator 2x extruders for flexible filament like Ninjaflex or Filaflex.
I have done small upgrade from http://www.thingiverse.com/thing:222667 to be compatible with smaller springs and really flexible filament.
A small puffiness avoid to block flexible filament into the extruder.
You can use all kinds of plastics with this.
Enjoy