Remixed @TeachingTech 's Self Feeding Open Source Filament Pelletizer, adding a soda bottle thread, removing the need for the additional TPU Seal, widening insert holes, and adding additional material around inserts.

The amazon router bit linked in the original post is not long enough, so redesigned for the KT01133434, which required adjustment of Spacers A & C. 

Used threads of the below link

PET bottle PCO28 1810 thread standard