I'll let my colleague, Nick, chime in about what mods you would need to make so that this will work correctly, but I would like to point out that each parameter can be assigned to the expression pedal with an arbitrary minimum and maximum value. So, if your expression pedal is going backwards, you could flip your parameter mappings to match it. But I suppose this won't help with algorithms that read the expression pedal value directly like PitchFlex.
