Hello.
I don't actually play the concertina (perhaps one day...) but I do have a question.
I do play the guitar, and the action of pressing the strings brings up callouses on the finger tips. (All guitarists have them; they're inevitable.) What I wanted to know is, does pressing the concertina's keys have the same effects? Do you get callouses?
I don't have any real reason for this enquiry, it's just that I'm very interested in other people's instruments, what's involved in playing them, and so on.
So please satisfy my curiosity!
Best wishes to all.