about diffusion, I had really excellent results by grinding the front of the buttons down to a rounded surface... I also filled in the backs to where the LED's bareley have enough room to fit after being pushed... I only finished one button last night, so I didn't take any pictures but I'll try to finish them up and get pictures up.... it didn't difuse all the way but did fill in a lot better than what I've seen so far but your left with a shiny round button... (I think is kinda cool looking), If I get some time tonight I'll try to finish and post some pics