Bizarrely I have been thinking about this quite deeply over the last few days, I even looked on the website at the front of this forum to see if a scale tablature was there.
I and I believe that many others would find it useful if there were available a list of scales say C, G, D, A, E majors (sharps) F, B, Eb, Ab majors (flats) showing which buttons can be played on the pull and/or on the push. I think four sharps or flats should be plenty enough range to allow accompaniment with anyone!
I am going to have a go at this but it would be useful if others could chip in with suggestions.
If there is a book already out there that has done all this then I would also be grateful if someone could point me that way.