Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4346450.
This is a horizontal auto rewinding spool holder, which uses the rewinding clutch systems from the Universal Auto-Rewind Spool Holder (https://www.thingiverse.com/thing:3338467).
I have split the hub into 3 pieces to make for easier printing. To hold the 3 pieces together, you will need 8 m4 x 8mm tapered head screws. Approximately 70 6mm ball bearings to run in the race between the hub and the base, and finally two 608 bearings (e.g. 608ZZ or 608RS) for the spool hub.
If you have any desired changes, customizations, etc let me know.
PS. the bearing race has been positioned to provide a decent amount of plastic around the outside, without making the diameter excessively large. Testing this arrangement and may increase the diameter of the bearing race if problems are found.