Was having problems with the filament drifting on the direct drive extruder of the Printrbot Simple (v2) so I merged the STL version of the laser cut parts and added an extension tube in Tinkercad. I'm still having issues with the filament not grabbing enough or too much and chewing it up but that's another problem to solve. This thing was made with Tinkercad. Edit it online https://tinkercad.com/things/4OLHjwm587B