Update on my custom Koala keyboard. I bought a few sets of used key caps cheap, and I’ve added some to make the layout easier to read.
For example, the red 0 key is record, the pale blue keys (in Koala blue) mark the scene selection keys. Yellow enters edit mode, and the other blue PRT SC key toggles keyboard mode.
I added the line of TGBN both to mark off the 4x4 grid of sample pads on the left, and also to mark B and N (mute and solo).
It’s a bit of an explosion in a paint factory, but it works. And the different-sized caps also help differentiate by feel.
