Universal Spool Hub for OmniStand

After getting started with my Flashforge Dreamer and printing @BaronWilliams' OmniStands, I was able to use a wide range of 3D filament from different manufacuters. The problem was, they tended to use filament spools of varying depth and diameters.

My first attempt at a solution was printing a variety of spool adapters that would fit on the OmniStand rods (see my Customizable Spool Adapter).

Then I got tired of keeping track of which adapter goes with which brand of filament/spool. So, I