Thanks AJ, that's good info.
I am a little slower mentally than I used to be. I am not sure if you mean that the 20 Block Registration settings are isolated from styles so that different styles are available with each registration change for a song, and that a foot switch push can select a different style as well as voicing, tempo, etc in the middle of a song. I tried Korg, as well as Roland arrangers and both have registrations (voicing etc) that are tied to a style unless a separate action of selecting a different performance setup is used. Both are too slow to respond for my use. The Technics registration change is almost instant.