Hi, everybody. New here. Just received my new S770. I have been a Roland user, so trying to slog through the manual and the online manual. I am a live performance player doing cover tunes. Split keyboard, and I play left hand bass, right hand chords and want to tweak the drum kits within each rhythm I not to use, Can somebody tell me where to go to get a tutorial on how to change drum kits? These rhythms are great, but there are some cheesy sounds that I would like to either delete or change altogether. Been through both manuals and can't figure it out. Can anybody help?