Home / Forums / Vintage Melodicas / Hohner Melodica Professional restoration / Reply To: Hohner Melodica Professional restoration Reply To: Hohner Melodica Professional restoration November 6, 2018 at 9:37 pm #10424 Alan BrintonParticipant Can you say a little more about drilling out and thread tapping the holes, Clep? Doing this with all of them seems like a good idea.