This is what decided to use on my Sx900 Regs.

Reg 1-Select the song and style.
Reg 2 through 8 --- changing volumes, Variations, instruments, delete parts of the Accomp. and sometimes changing to another style that complements the first one to add another feel; fantastic for Latin music.

I keep thinking, what would the band do if I were singing? – what would it do if a sax were playing, or a piano? All parts of a band are not always playing.

I guess, in a way, I am trying to bring back my band days. (smile)
John C.