Filament Dust Cap

I wanted to keep dust out of the extruder assembly, but I didn't want to keep cutting off and wasting filament. So I remove the filament and put this dust cap on when the printer is not in use.

To make the dust cap, just glue in 45mm of filament into the cap. This allows the extruder motor to hold the dust cap tightly in place.

I included the .stp file if you want to make changes.