Hi, Tatu
Really like your button harmonica. I am working on a similar personal project to make a janko keyboard instrument, but am sadly working in a vacuum, since I have no access to accordinas to examine for construction details. I wonder if you would be willing to share photos of a disassembled instrument that might clarify some of the construction details. I have already seen the borel patent drawings, but would love to see a real Instrument disassembled.
Thanks
Shannon M