Filament Spool Adapter for a 55mm ID Spool to a 1" OD dowel

I created this spool adapter to put 3rd party filament brands onto a custom spool holder I made out of a 2x4 and a 1" dowel. The center is sized slightly above 1" so that it doesn't grip the dowel tightly. The inner ring is sized to friction fit into a 55mm center diameter filament spool. Many of the spools I've accumulated over time have a 55mm hole.

Update 02/22/18: I created a second version with a tapered insert. It fits another brand of filament I had better. If you need a different size