Printrbot Simple Metal Flexible Filament Extruder Arm

After I ordered some NinjaFlex SemiFlex and attempted to print it with countless other add ons I found on thingiverse, nothing could print it for long without buckling. So I took matters into my own hands and designed this.

This is a replacement Extruder arm for Printrbots that is modified to be more suited for printing flexible filament. The shaft guiding the filament to the drive gear is longer than the one on the original aluminum arm and the flat parts sandwiching the bearing encroach