Prusa i3 MK2/S PTFE Ball Filament Guide ClipOn

I made this filament guide to combine two other neat ones out there to get the best of both worlds. It's snapfit so you don't need any screws, and it captures the filament in a print in place ball sized to take a 2mm ID 4mm OD PTFE tube. It's designed for a spool sitting behind the printer.