After staring at the RGB LED I installed in my Atreus keyboard for a while, I converted the stub of a ¼-20 nylon screw into a light diffuser:
It stands slightly proud of the surface plate so I can extract it without dismantling the whole keyboard again:
I’ll eventually make a better-looking diffuser from a recently arrived translucent acrylic rod, but this will reduce the accumulation of fuzz inside the keyboard until the matching Round Tuit arrives.
The Smell of Molten Projects in the Morning 