Flexible Filament Extruder

EDIT: It can still jam with this extruder! (less then before tho)
The main cause of problemes:
-the filament is to much flexible (ex:ninjaflex)
-to much restriction in the bowden
-to much restriction in the hotend:
-clog / partial clog
-low temp
_______________________________

This extruder is made to print flexible filament with the aluminium extruder. The tolerance between the gears are Really small, it might even touch it.
You don't really need specific tool beside the 2mm