Remix of Tempo502's B'Struder for use with the Turnigy Fabrikator Mini 2.
The remixed Arm accepts a 2/4mm PTFE tube in the filament path, it also uses original Fabrikator extruder spring.
I was able to print with flexible materials (TPU) using this extruder.
I have yet to print the remixed extruder arm as I had some issues with material binding inside the original one. I remixed this part to accept a PTFE 2mm/4mm tubing in the filament path and that should solve all issues.
It was most probably an issue with my printer settings as the filament path in the original design is 2.2mm wide.
Print the mount with supports, I used PLA and even though my extruder motor got pretty hot at some point, I had no issues. You can try printing with a more heat-resistant filament if needed.
Arm can be printed without supports.
Things attached were remixed in Fusion360 from original STL files.