I modified MakerBot’s Smart Extruder to print NinjaFlex. I went to MakerBot’s office and talked about that. Their R&D team might develop my part to make a flexible printing Smart Extruder. Now I can print NinjaFlex with my Replicator 5th gen.

As information, I AM ONLY 14 years old. I designed it with @SolidWorks (Also I passed CSWA exam (220 out of 240)). I printed it with @MakerBot.