As far as the light "leakage" into the display panel, assuming that the indiglo sheet goes into the clear button, you can just use the 'ole magic marker to blacken the side of the button. This should limit leakage. The other thought is the color of the indiglo light. I've seen indiglo in two colors, a greenish and a blueish shade. Of course, I have a blue Mk2a, so I would want blue indiglo. But sign me up for a kit if the price is right.
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~Max