Filament Pulley Guide with 693 bearing

Maintain the lowest amount of friction possible on your filament feeding system.... and this will help!

The UM2 bowden-style extruder feeds from the bottom but didn't have a filament guide aligned vertically below the extruder's opening. This caused stress and friction while feeding.

I searched around and found Wired1's design and liked it the best and decided to use it as my starting point. I used a small 3M command strip to affix the mount to the back of the Ultimaker, making for ea