Don't know if you heard this yet, Kingfrog, but this is me improvising in Pianostyle Mode on the G70...
. http://www.roland-arranger.com/smf/index.php?topic=444.0

Seems to track me fairly decently. I know I can't play COMPLETELY pianistically on an arranger, because with a piano, so much is implied rather than played, but I find I don't have to adjust my playing THAT much...

And then just adjusting to that 'don't play more than two notes at a time and the chord won't change' mode. You'd be amazed at how much you can play with just two notes, if your fingering is clean...

Pianostyle Mode with the OnBass (bass inversion) ON on a Roland is VERY pleasant for a pianist to adjust to, IMO...