One question for ToneX users: when you recall a stored preset, the position of the physical knobs no longer corresponds to the values of the new preset you just recalled, right ? So not only the physical knobs no longer represent the current tone settings, but also if you adjust the knobs from there, you may experience a sudden bump?
Why this kind of device doesn't use rotary encoders with LED rings instead?
That way, the knob would reflect the parameter value even when you recall a preset, and you always adjust the parameters from their current value, so there's never a sound bump…