I watched the video, and I ‘believe’ I know what you’re running into. The GRUMBLE_BULB Program was saved with your expression pedal out of position. That point in the treadle throw is also saved, and reloads with the Program. Any subsequent pedal motion jumps to its current position.
You can test out my theory:
- Load the Program, and don’t do anything else to it.
- Put the expression pedal exactly where you want it to load (full Toe, if I recall).
- Re-Save the Program.
- Switch to another Program, then back to GRUMBLE_BULB.
- See if that’s the solution.
