I got given a very nice 120 bass Nicolo Salanti accordion (used) from some friends of a friend (!), and was able to use it Christmas Eve for our usual Old Folks Homes Xmas caroling session...
Now I've got to re-learn my LH technique all over again...!
(Oh, and a T-shirt that says '88 keys... 10 fingers... No Problem!'. Cute...)
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An arranger is just a tool. What matters is what you build with it..!