Another thing I uncovered in a careful reading of the manual... the FP-50, FP-80, and even the BK's recognize the 7/13 jazz chord ROOTLESS! Remember the great Rootless chord debate? Well apparently Roland finally got on board. 7/13 is the only one shown in the appendix, it can be triggered by playing the dominant 7th, 3rd, and 13th. I don't play Jazz, so I don't even know which others to try. I don't recall this being a heavily advertised feature, but for Paul's purposes (and others who play piano in a jazz combo) it might come in handy.