This is a bracket used to hold a ring of LEDs used to produce a visual indication of the position of a CO2 laser focusing lens. I think the concept of this item is more important than my specific implementation. I would expect future makes by other people to be heavily influenced by the LED array and magnets that are readily available. (if magnets are even used.) I have included the source file for the OpenSCAD design for anyone that may find it useful.
Here is a YouTube video of this item in action:
YouTube Video: LED Ring - Laser Position Indicator
This item was heavily influenced/inspired by a YouTube video by Peter Jensen. His video (linked below) shows a 4 LED version with a few more bells and whistles. He even offers a kit version (at the end of the video linked below an e-mail address is provided).
YouTube Video: 4 Dot Laser Cutter Position Indicator