Yep, I'd like to drill a really fine hole in the centre of each of the bumps. It's actually really surprising how much light comes out of such small holes. I should be able to drill the centres out but still have a reasonable amount of the bump left over. I need a knob illumination board first though.
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(list 6284, Mk1 S/N 00299 4GB blue [sold]. Mk2 S/N 080000094 20GB blue)