VIRP Version 3 Geared Extruder

Based on many other usable extruders but tweaked to be used with an 8mm ID Hobbed pulley mounted on a 50mm X 8MM hex bolt. Works well with PLA or ABS 3mm filament.
I don't use a herringbone gear because that would mean complete dissassembly to get to the filament. In my design the Nylock nut on the back side can be removed and the large gear with the hobbed pulley can be removed very easily for clearing/cleaning after a "spinout"