One of the reasons I've not been interested in this hack, as nice as it is, is the inconsistency of the light. That is, the fact that the buttons themselves work as lenses and refract the light in odd ways.

I don't know if the compound that Brian is using to make the replacement would allow for this, but what I think would look very nice is a button made from two different materials, so that the top of the buttons would be opaque, but their bases would be transparent. If the top opaque part ended shortly before the fascia started to obscure the buttons, there would be a light leak around the edge of the buttons, which would tend to outline them. This would allow for a neat, visible-in-the-dark effect, and would get rid of the mottled nature of the light dispersal.

Brian, is there any way for you to do this? I could easily see where it might be incredibly difficult, at best, to get the two plastics (or epoxies or whatever they are) to join without mixing, but I think it would be extraordinarily cool if you could get that to work.