left hand only selects a chord when it passes through the chord collider going 'down'. The chord doesn't change until it passes back through the plane going up.
@zachkinstner response:
I like the "pass through" chord selection concept. In general, I've been thinking about "locking in" the chord selection, so that you can release your left hand without the chord jumping back to E (or Open).
mptp response:
Locking in is perhaps an even better idea - that would give you 6DOF expression control. Perhaps a gesture returns you to E/Open?
mptp at Reddit:
@zachkinstner response:
mptp response: