608 bearing filament guide

This is my first thing! Forgive me if it's not so good.

NOTE: After a day or so of using this, I'm finding that the post that the 608 goes on could be a bit skinnier (.25 or .50 mm) and that the snap at the top could be a bit longer (another 1 or 1.5mm). Still, not bad for a first try! I will try to update this thing in the next day or two with these modifications.

I keep my filament spools on a roll made of 1/4" PVC pipe at one end of my desk. My 3D printer is at the other end of my d