Nice!
The Clavinova rendition is so close to real that I would have sworn it was played by a full band.
A/B-ing it with the .not file, played through my Yamaha XG machine, the Tenor Sax seems to be the same sound, but the Bari. Sax, in particular, sticks out as rougher on my machine. The Brass/Bari. Sax blend in the mp3 is great; very convincing.
Very interesting to see your use of the shorthand slash chords and repeat symbols we've talked about elsewhere. We don't, however, have a piano track here, just the slash chord symbols, so is there some "body" missing that the piano would have added?
I'm sending all of my big band tracks to you from now on for finishing.
David