I'm surprised I haven't seen this come up yet, but as you are using a mono space font, would not a mono legends kit (numbers and symbols and special characters) be perfect for it? On an ortholinear or staggered columnar board every legend would be aligned perfectly, just like you'd expect with a mono space font. I don't see any ortho renders, and the effect is not as noticable on a row staggered keyboard. That's the one thing stopping me from being in on this set.