Hi Wellington,
I was charged a nominal amount by a friend, so I allowed total artistic licence!
The artwork is going through some tweaking, so I'll ask about the colour, as I share your sentiment.
I requested additional printing below the knobs to indicate their function, which unfortunately is covered by the same!
(didn't think that one through!)
The knobs aren't original as you can see, so it's back to the drawing board. Smaller knobs may work, or a reprint of the vinyl with the printing above the knobs.