Home / Forums / Melodica construction, repair and maintenance / 3D Printed Melodica Parts / Reply To: 3D Printed Melodica Parts Reply To: 3D Printed Melodica Parts August 29, 2017 at 8:18 pm #9205 Paul DurhamParticipant I certainly don’t have that kind of talent. I WONDER, how can you widen the keys when the spacing of the key pads remains the same?