I've seen something similar. A couple of problems I see, one, they don't do white. Two, the big problem, the intensity of those are around 8 mcd, while the white LEDs I use are 780 mcd. I could probably come up with a way to attach a small resistor in place of an LED lead, that would go beside the buttons. Then you would only have to solder a solid piece of copper in place of the resistor pack. I don't know how much easier that would make things.