I have a Yamaha Sx900 also. I posted some of my ideas about the Playlist and the Registrations about 9 months ago, it may have been to soon; people were just getting acquainted with their new Sx900 keyboard.

1-One Reg. per song.

2-One Reg. 8 banks if I like the song. That also goes into the Playlist.

3-Create a Band --- 8 Regs.
Example of my Big Band 8 Regs.
1-Piano 2-Trumpet 3-Clarinet 4-Sax section
5-Trombone 6-Soft Brass Section
7-Med Brass Section 8-Strong Brass Section

Please, do no more till my next post.
John C.