this is fascinating for me,
because I based a lot of my melody style playing on the concertina,on playing melody where i could,even if it was on the off beat.,which didnt matter because I was singing,if I played the melody on the second half of a crotchet,on the break.,it sounded good if the harmony note preceded,or followed it
but I based my ideas on the Piedmont style of finger picking.,but its all music.,and not far removed friom crosspicking.