Might have a go at a knob board when I get the time and the bits - doesn't look all that hard either.

As I said in another thread, I'm currently not even using the knob board. The board was very nice, but after having it in there for a while, I decided to change the layout of the LEDs. So I re-wired everything as loose components and bits of wire, inside a piece of clear shrink tubing which "wraps" around the shaft. So it's possible to do it without any board at all, just the bits.