Ceiling Fan Light Diffuser Ring

This model screws into a ceiling fan as a replacement part for one that had a diffuser that broke.  It does not diffuse the light but provides an attachment for a new diffuser.  A simple circular piece of diffuser plastic was glued to the ring.  The ring was made from PETG and does not require any support structure.  The FreeCAD model is provided and has a parametric spreadsheet to tailor the dimensions to your needs.