In that case, carefully use the treadle itself on the pedal to dial in your initial start point, then Save. It’s still storing your current expression pedal position on the Save operation. When you move the pedal again, it will jump to the appropriate position within the mapping range you have set.
Catchup mode, for you synth-heads. I hope that Mission pedal doesn’t have much MIDI jitter. If you happen to make any more preset changes along the way, be sure to repeat the treadle process again, or wherever the treadle is currently will be your new stored start position.
