Here are photos of the (unexpected) second batch of red samples I received today. The texture is better, the light diffusion is smoother, the bottom button is fixed, and the knob height was extended 1mm (against my previous decision).

The red buttons look good with brightness at max, though their color matches much better than the photo shows. Since it was a beautiful day out, I got a very accurate natural-light photo.

Now to just wait a week or two for production, then it's open season on lit buttons. Let's keep the curse at bay for just a little longer!!