Spool Adapter

I have several spools that are 53-55mm hubs, but my spool holder is 20mm... made this adapter to keep them spinning nicely and not rest on the printer.

Note: this does not work with the stock Duplicator i3 spool holder. This is made to work with a Taulman-style spool holder. I use it with:
http://www.thingiverse.com/thing:1547826
and
http://www.thingiverse.com/thing:559623

Print Spool Adapter - Covered Bulkhead.stl and Spool Shim.stl if you want an integrated system.

The shim is des