Beaky,
If you've now decided to keep with the S900 voices, there's no need to "make do" with the S900 default piano. If you want an edited improvement over it there's no need for Cakewalk either, it can be done on the keyboard.............

..Or immediately with minimum effort if you download the file in Post 2 of this thread?

Plenty of people have used it on Tyros's and S900 and found it a worthwhile improvement.

Interesting how my original post continues to be ignored - Just trying to help

John