This is super fun. How do I change the Adv value (not in your picture) ? Are you considering a delay tab? Could remove regard the Adv value? How do I make OFF commands (maybe A?) ? Maybe horizontal note input via shift? I think all my FR would be to emulate renoise workflow and commands...
I get some reaconsole errors holding backspace, maybe too much keyboard input. Can't use 2,3... for c#,d# etc.
Keep it going