Ian ... that ModernJazzBallad style sounds like the perfect style for me ... I only wish there was a similar style on my KORG Pa900, with a double time variation ...
There is a style on the Yamaha 9000Pro that does basically the same thing...it's simply called
Jazz Ballad 1 (it's at 84 bpm) and since it doesn't use any mega-voices, it shouldn't be too difficult to convert to Korg, if anyone here does conversions.
It's not quite as good as the
ModernJazzBallad I mentioned above, but it's still very usable and it does have the double time on Variations C and D.
I can send the original from the 9Kpro to you if you wish.
Ian