Here is the Universal LED ring Light Mount from my USB Microscope Stand. As for the 3D printed threads, they fit a little tight at first, but if you slowly work them in and out they wear in a little and start to move smoothly. Printing threaded parts at 0.1mm layer height will be helpful (include parts with internal threads)

Build List:

Qty (1) - LED Ring Light Mount (fits 102mm inner diameter 120mm outer diameter LED ring lights) Qty (3) - M8x1.25 Adjustment Screws

For the printing, I used PLA with a layer height of 0.15mm (0.1mm makes a smoother thread), 3-Layer perimeter, 4-Layer top and bottom layers and 15% infill.

I used this for the LED ring light along with an Arduino for controlling the WS2812B Addressable LEDs (Choose 45 LED version):

https://www.aliexpress.com/item/DC-5V-WS2812B-Module-Strip-16-35-45-Bits-WS2812-5050-RGB-LED-Ring-Lamp-Light/32799365063.html

This is for the smaller ring light mount, these are regular LED (not RGB Addressable):

http://www.aliexpress.com/item/B86-Hot-2Pcs-Bright-White-100mm-Angel-Eyes-33-SMD-LED-Ring-Car-Light/32777360207.html

Also this can be included in the circuit to make the LED light dimmable:

http://www.aliexpress.com/item/JFBL-LED-Dimmer-12A-12V-24V-for-LED-Strips-Monochrome-Controller/32715991568.html

12V 1A DC Wall Adapter:

https://www.aliexpress.com/item/FW1S-AC-100-240V-Converter-Adapter-DC-5-5-x-2-5MM-12V-1A-1000mA-Charger/32521084783.html

DC 5.5 x 2.5mm Female Plug Adapter:

https://www.aliexpress.com/item/10Pcs-2-5-x-5-5-5-5-2-5mm-DC-Power-Female-Plug-Jack-Adapter/32705277140.html

Or you cal us this DC 5.5 x 2.5mm Female Plug Adapter if you prefer to solder and want a cleaner finish:

https://www.aliexpress.com/item/1pcs-New-Black-5-5-2-5mm-DC-Power-Plug-jack-ABS-5-5mm-x-2/32833995712.html

For anyone who does print this, your feedback would be much appreciated.