Summary

My solution to a spool holder similar to the OEM one. This design allows you to make a holder for spools with undersized holes. Some corners are filleted to prevent stress concentration (the failure mode of my previous 3d-printed filament holder).

Print as shown. no raft. no support needed if you're using a material/printer that bridges well. If you want a symmetric part, you can adjust that in the customizer but will need support material. Regardless, please print in the rendered orientation for maximum strength.