the NewFace comes with either standard black buttons or transparent buttons and a new Volume knop

Will there be a choice in colour of the transparent buttons that you will provide ? I don't know if you know this, but with the button hack it's actually the buttons that provide the colour of the light. If you just provide clear transparent buttons the light would simply be white. (not pretty)
If you could provide different colours of transparant buttons perhaps that might be an alternative.
As for the knob : I like your design, but I think I will stick to the one Brian made. It's made to dissipate the light optimally and I really like it.