Home / Forums / Melodica construction, repair and maintenance / Tuning and Gapping Hammond Bass melodica / Reply To: Tuning and Gapping Hammond Bass melodica Reply To: Tuning and Gapping Hammond Bass melodica June 7, 2015 at 2:15 pm #5431 LowboyParticipant Hi Alan, I bend notes on both the HM-26 and HM-27. The same note, particularly higher ones, on both instruments will be easier to bend on the HM-27. That is my perception anyway. Lowboy