During a course in digital design, a key element was the FPGA GoBoard from nandland.com. I wanted to create a enclosure for it, seeing as it would live in my backpack for a semester. Key requirement was beeing able to see the four LED's. After some tinkering and tweaking, this design ended up beeing final:

The original plan was to use lightpipes, as one would in regular enclosures:

These nifty looking plastic bits help transfer the light from an LED to the oustide of an enclosure. After searching around a fair bit there was a lot to choose from, and they usually come in quantities 1k+. Which was much more than I needed.

Seeing as this enclosure was supposed to be 3D-printed anyways, I added 0.2mm layer of white PLA on the surface-layer and made a sylinder that reached down and covered each LED. That helped with channeling the light as much as possible.

The end result worked suprisingly well. The use of PLA also made the assembly almost non-exsitent. (Still have to melt some heat-set inserts though)

If I were to change anything it would be to make the compliant/flexing buttons bigger, as that would simplfy pressing the tactile buttons on the PCB. If you're up for it the design is accessible on Onshape. The STL and .3MF file is hosted on GitHub