If you are interested in a voice that mimics the dx7 rhodes, send me an email to email@example.com (put SD1 in the subject line). I have a voice set up that you'll love.... but there is a bug in the Sd1 that causes you to have to slightly modify one parameter (back and forth to keep it the same, each time you use it.
However, There is also another bug; one time I was overdoing the polyphony with this voice, and the keyboard froze. So I'm afraid to use it in performance. By the way, this modification of "fm piano" has nothing to do with Exp.