I just talked over some more possibilities with the caster. He thinks that he can get buttons with transparent graphics molded into opaque parts using a stereo lithography process involving lasers (as discussed in this thread). If this is something you want it would help tremendously if you would decide on a design for the buttons and knobs, as we're only drawing up one set of files. Another possibility is to have a somewhat rubbery feeling material in the opaque areas surrounding the clear areas.

Also, does anyone know if there are CAD files for the knobs and buttons floating around? It would help a great deal when generating graphics of the appropriate size and shape.

Stu