"These comments are coming from one who has been playing very responsive "modern" ji-ari flutes almost exclusively. For the record, I have in my possession a very pretty ji-ari 2.1 by Gyokusui (the son) worth $2000--it isn't mine--and I'd put your 2.1 well ahead of it for playability and responsiveness, even up high. - E.B., CO. 2003