Each of our Japanese technicians services and maintains ONLY ONE brand of flute. So they have amazing knowledge, and know exactly what to look for, and how to make adjustments correctly, so the instrument plays to its absolute potential. Always ask who prepared any flute for sale, their knowledge of that instrument, and where they studied it. Our Miyazawa, Muramatsu, Altus, Sankyo & Yamaha technicians have all trained and studied every model thoroughly, at the respective manufacturer's factories/facilities.