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Has anyone had any experience with this horn? I was not previously aware of this horn, but I played one over the weekend and was impressed with some things and disappointed with others. The sound was good at mid-range dynamics, but suffered at the extremes. It is also one of the only F tubas I've ever tried that didn't have that characteristic stuffiness around C below the staff (just a hint on the B, but nothing severe). Seems like they're on to something but might need to do a bit of tweaking before it would meet the demands of a professional player.