I believe it is! I will use the program you have suggested and make my own fingering diagram and post it here when I am finished. I also think that the F row differs slightly but it might just be due to the instrument, from what I have heard Scholers do not have a great reputation and I bought this used at a garage sale and have been trying to get a lot of the reeds to voice better. Is there a way that concertinas are typically set up as in is there a "normal" jump between each key? Thanks!