I have a recording of Guran playing concertina with a couple of his friends.Excellent work.
I find the first part of the points raised interesting as I have noticed that beginners have great difficulty playing notes on the pull,having a tendency to drag the note rather than playing it the same way as they do on the push.In fact it is one of the reasons most beginners have trouble with lack of air.
Many top players use the fanning system of playing their concertina and I have noticed a number of piano accordion players use this method.I am self taught so I have adopted a non fanning approach.
Nice to hear from you Guran the last time we spoke, due to health problems, you could no longer play the concertina ,which is a great shame as you even played at some of the ICA meetings in London and saw and heard some of the great old players.
Al