Dual Bearing Filament guide

UPDATE: BE AWARE that I have confirmed that this design can cause enough variable tension to result in horizontal banding issues where the extruder is on the X-axis. It shouldn't be a problem for a Bowden set up.

This is a dual bearing filament guide for use on a 2040 extrusion (like an AM8).

I like having the filament feed off the bottom just past the center of the spool. That way if it sticks, the roll will pull straight down. If the feed is off the front, stuck filament can/wil