I saw a sample in MikeDeuce's thread of successful implementation of labels in the EE buttons but the difference was the disks he used were black and clear, and the standard disks from GGG are black and white, the white diffuses the light a little to much and you loose clarity in the text/graphics on the buttons.
My honest opinion is that it was not a successful implementation. When I saw the images, my thoughts were "well, it sort of works", but it wasn't really something I personally considered to be a "good idea." The EI buttons are made to diffuse light to the greatest degree possible, which means that their design is incompatible with the insert method. In other words, the better they are at doing what they were designed for, the worse they will be at allowing the use of an insert. Applying a vinyl decal to the top surface is, IMHO, the better approach for the EI's.
If Randy reads this maybe he'll take it as a suggestion to offer versions of his disks in a black and clear option. I imagine that they would look better in the nova gems too.
I'll consider this. Weeding them isn't that big of a deal and the designs are already vector so they can go straight to the cutter. Of course anything with fine detail would have to be omitted from the selections. But again, after comparing the two methods, I believe that the current PGI's have the benefit of being more legible in a NovaGem due to to the diffusion that occurs in the white areas of the design. It also makes them more legible when they are not lit.
RandyT