Lamp screen adaptor ~42 mm to ~36 mm

We bought a new screens (IKEA Januari) for the old IKEA lamps in our dining room. The holes of the old screens had a diameter of ~36 mm and the new ones have a diameter of ~42 mm.

The solution for this problem is this small adaptor that reduces the diameter of the new lamp´s holes :)

FreeCAD source included!