Home / Forums / Melodica construction, repair and maintenance / Pimped Yamaha P32D / Reply To: Pimped Yamaha P32D Reply To: Pimped Yamaha P32D February 28, 2016 at 10:31 am #6866 DarenKeymaster MM, speak to Jana Forstová at Harmonicas. His email is forstova@harmonikas.cz Shannon, the chambers are too short. Not all of them, but most of them need lengthening by a few millimetres.