Light Pipe Adapter for Raspberry Pi 3 Model B

This is an adapter designed to move the Raspberry Pi Model 3B LEDs to a front panel when integrating it in an enclosure.

It fits highly affordable 1mm diameter PMMA light pipes (sometimes also called fiber optics), and provides a reasonably bright display at the far end. The main use is to see if the SD card is active when powering the Pi down with a soft power switch before cutting the main power.

A small panel mount light pipe adapter is also included with a matching nut. Thread type is 1/4" ACME since it's very easy to print. It will fit in a 6 mm hole if your drill is sloppy.

After printing, ream the holes with a 1-1.1mm drill to clear out printing gunk. After pushing the pipe through, I suggest grinding the ends flat. That improves light coupling and significantly improves the look of the exterior end since it's more omnidirectional.
The easiest way to do it is to use a dremel with the standard drum-sander accessory at 10k rpm or more.
Since the end is often widened a b