That was an excellent presentation. Clear, concise, complete … more difficult to put together than it looks; especially in a forum format. It’s always informative to sit in on another’s approach. You’re going to make life a little easier for someone along the way – whether it ends up getting acknowledged or not.
Tangentially, it nudged me into finishing up some breadboard experiments that I have, languishing on the bench. One inspired by that “Plus” freeze-type pedal: a big, honking keyboard sustain pedal / expression pedal hybrid for the H9. (I need an Aux/Exp combo that I can’t possibly miss, for some granular looping).