I share your liking of the fact that the MkII buttons are easy to identify in the dark and that is one of my concerns for the round ones I have in the design at the moment. As I said in my post, this is a work in progress and it would be very desirable to have shaped/contoured buttons. If someone else is able to do the machining or casting (we'd still need to have a mould made) maybe I could design some which are better looking and easier to identify in the dark. Of course Illuminated buttons would be great.