In addition to the printed parts, you will need the following for each light pipe set:
- 1 x M2.5*15mm nylon screw
- 1 x M2.5 nylon hex nut
- 2mm PMMA fiber optic cable
Glue the "pig nose" blocks to the inside of the case (CA glue works well) and allow ample time for curing. These blocks will be used both for holding the light pipes in place, as well as a drill guide for the panel.
Drill out the panel holes, using the blocks as a drill guide. Drilling the panel holes slightly undersized gives a better finished recessed appearance (avoiding the issue of dressing the ends of the light pipes) and allows the light pipes to be put under compression. I used a 1/8" drill bit with a bit of heat-shrink tubing on the end to help center the bit.
Cut the PMMA cable slightly over-sized and push the ends through the block for the Raspberry Pi LEDs. Push the other ends into the panel block, ensuring they are seated completely. Then position the Pi block and trim the ends flush with diagonal cutters.