A ring for a light in the cieling.

A friend had a problem with one of his lights in the cieling.  The newly bought led-light amature wouldn't fit in one of the holes.  The other three did.  The armature sticks about 3 cm out.  To overcome this he asked me to make a simple plastic ring which would cover the part between armature and cieling.
  The design is very easy to make in Blender.

After 3:20 hours the print was ready. It looks good.

And it fits in the armature of the led light.

And here an image with the metalclips in it.

Next will come a picture of  the end result.

Ring: 3:20 hours print time
height:  3.5 cm
Diameter: 8.1 cm
Shell tickness: 3 mm.