Hello Lionel and David,
Lionel, your posts and videos on Sax on the Web are what interested me about the melodica. Your playing of the P37D is very good.
David, I am encouraged that you are still working on the Jankó keyboard. When that keyboard arrangement was first conceived, the mechanical complexities made costs and manufacturing difficult. But now with electronics I’m surprised we don’t have a revival.
Yet, I think a Jankó melodica, being mechanical and using air, is still very complex.