This is heatsink mount for my Ender3 for cheap LED lights. It simply twists in the aluminium profile and sits tight.
I had to connect two LEDs in series in order to get 12V on each other. Then I realized it makes too much heat so I replaced one LED with a fan. It is my first prototype and it works great, feel free to comment and remake.
Fiberlogy Easy PLA
Printed on my Creality3 using Cura 4.
0.2mm layer height
I used 0% infill and 4 perimeters/wall lines.
I suggest printing vertically with the twisting-in side down. Use supports.
Remove supports and possibly sandpaper so that it twists-in nice and firmly.