Home › Forums › Products › Stompboxes › H9 Knob Popped off – help! › Reply To: H9 Knob Popped off – help! November 30, 2015 at 10:49 pm #141690 gkellumParticipant xdadex wrote: is there another piece in there that I'm missing? or perhaps a tricky way to put it back on? Could you send an email to email@example.com with this photo? We do have instructions on file for re-seating that knob that they can email you.