Ceiling Rose Canopy Abzweig-Baldachin

I am not sure if the name for this part is right... I searched quite a while for the correct translation. But at first I didn't even know the german word.... :D In german it is called "Abzweigbaldachin" so the direct translation should be "branch canopy". It is that part you mount under the ceiling where the cable for your light comes out. I bought one of those at the near hardware store and thought it is much too expensive for such a cheap part. So as I needed one more I decided to nearly copy the part I already had by taking measurements and doing a little reverse engineering. It is quite easy to print and I designed it to be a little more robust.

The part has holes for screws and cables and a twistlock mechanism similar to the original.