Can't help with you inquiries, Mike, but I'll soon have some more for your Barron discography...
On topic: an awesome set! Some may remember that last year when I was on vacation, I had both Pablo Tatum boxes with me, as well as the Capitol and Verve 2CD sets. And that was my first real exposure to Tatum, and -wow- I was astonished!
I was able to make it through maybe 2CDs a day, half a CD at the time or so. The solo masterpieces might be considered the holy grail of jazz piano, or whatever. Certainly one of the most impressing achievements made in jazz!
ubu