A different way to hold the heat sink. It slides into the profile and fits snugly. A drop of superglue will hold it there quite well. There are two different kind of swing arms. One extends a little further out and hence has more movement of the attached light. The other has the hinge towards the inside of the swing arm so mounts closer to the wall but has not as much adjustment possible. Still to be updated is the shade, That has now been done. It is a tight fit but that is how you want it so it will stay in place with friction only. If you slice it at 101% it fits just right. After looking at it for a while I decided that it was not that important to be able to swing the lamp so redesigned the wall plate that allows only up and down movement. If you use 22 gauge wire the leads can be neatly tucked away underneath. Combined with copper foil stuck on the wall and painted over nobody will ever see the power supply to the light. I made three of them as shown in the pictures. They all turned out great.
The last four pictures are of one of the lights installed on the wall. I used copper foil for the conductor as you can see. The second picture shows the light lit. And the copper foil attached to the wall. The third picture shows the power supply soldered onto the copper foil. The last picture shows the lit light and the foil painted over. Now it's hidden!
That's just the way I like my cords...invisible.
Enjoy.

Printed in standard .3mm layer, 2 perimeters and 30% infill in PLA should work equally well in ABS