Prusa i3 Berlin filament guide

Customizable filament guide designed for the Prusa i3 Berlin with aluminum frame. I designed the guide so I could use a loose filament spool (http://www.thingiverse.com/thing:39564) mounted behind the solid metal frame.

The frame width is adjustable, so it should work with other frames. You can specify where the guide opening should be relative to your frame and the arm length and angle will be automatically calculated.