Hi Geoff,
Glad you like the knobs.
Those Bottom buttons you see are friken horrible. They are similar to the clicking type from a cheap $1 calculator. Their caps are also insanely bad. When we were looking for RGB buttons, I was only able to find single color ones. My PCB designer found these which had 7 color combinations, so we went with that knowing we would replace them as soon as we found full RGB ones. I just didn't know how bad they were.
Luckily I found GREAT full RGB buttons. They have a translucent hard rubber cap on them. It's hard enough that it's not squishy, but soft enough that it feels rubbery. A really nice feel to them. They also have a nice travel. Very similar to the OLED buttons but slightly less force needed to push them. Both the OLED and the LED buttons feel similar to a nice mechanical keyboard.
They are rectangular and will be placed horizontally right under the OLED buttons.
I'm also glad to hear that you like the idea of these LED buttons. I remember not liking the idea of the extra size but I was feeling so guilty to dedicate 4 of the OLED buttons to modifiers which would essentially never change function.
It's really coming together better than I could have imagined. Of course I didn't get it right the first time, hence the delays and the extra features added later. But once I started playing with the initial prototype, things became clearer.
Let me know if you have any other questions.