Strange gibus is weird right now. I spoke with Jacobmeister https://gyazo.com/be57fc1a1c7b4b6e50d539c67d991207 then i made new suggestion for 12 keys, like you, but maybe day later erik suggestion was accepted. I did not do a new one, because I thought that it was not correct. So.. i hope your suggestion is fine to mods. And small info, like you can read from ss above - this gibus had parts if i good remember, but conversation with Jacob can help.