MakingBot replicator 2x flexible extruders
thingiverse
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 Instructions I recommend to print it in ABS, without shaft, with support, and a minimum number of shells of 4. You don't need to rescale models before printing.
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