After reading this all the way through, I'm not sure that the comments fit the question but here goes my comment anywho. I play diatonics and tremolos as well as playing at chromatics. As for keys I have sets of 12 in both the diatonics and tremolos... Thus answering another question posed as to whether anyone produced an E flat harmonica. The answer is yes but my tremolo harmonicas list it as a D# and my A# would normally be listed as a B flat.... Who would have thunk it.

Rayzor