Darn, it would be fun to hear Chick noodling in the reharm room.
Yeah Dave, nice playing, man. "Tones" - what a beautiful song. The chords don't need a lot of reharm, but the tune is so irresistible, I might try a take on it sometime too.
In that chart at the 14th bar from the end (Bb maj.7 descending to Abm, etc.) is actually just 2 bars of Bb maj7. In the first half of the tune it uses those chords, and the second time it rests on Bb maj7 for 2 bars, which actually makes it easier to play. I remember the Real Book had those extra chords. So you played a harder version and still did it good.
The CP300 is a clear sound on the recording, and would sound stronger direct into the computer. It has some convincing pianistic elements in the recording - the high A an octave and a half above middle C sounded just like a piano to me, and most all the higher notes too. I wasn't fooled into believing it was a piano, but it has a pleasing sound due to its uniform resonance. A huge improvement over the P120, and a direct recording of the CP would be even more convincing. 7notemode has those excellent recordings of the CP on his YouTube offerings.
String resonance is also on the GX you're ordering, but it's called damper resonance - fully adjustable string resonance you'll get when you apply the pedal. So I 'think' maybe Yamaha was the first to employ it.
Nice job again Dave on one of my favorite tunes, and nice to hear you on a new axe too.