Reusable spool adapter

Adapter for certain 3D printer spools to make them accept refills, spool needs to be cut 10-12mm from the edge of the spool to accept the outer adapter. The two pieces glue into the two cut halves and then use standard #6 wood screws, 1/2-3/4" should do.

Update : Added pictures with a clear spool before modification to show how it mounts, also pictures with it screwed together.