First, thank you so much for the comprehensive response and for pointing out the robust capabilities of the Ketron Registration/Block Registration system! Perhaps not surprisingly, a few additional questions come to mind:

1. Does the sd9 Arranger have this same capability with respect to individual and Block Registrations (the explanation appeared to be referring to the Audya 5 F1 - F20 setup)?
>>>AJ:- Yes. This registration process is reserved for the AUDYA series (flagship). The other KETRON products have the single Registration structure and on the SD9 Pro, you also have the capability to associate/link a registration with another file (e.g. Audio, Midifile, Text ...etc). Registrations can be called up by alphabetical search or numeric entry (since each registration is assigned a numeric value as soon as it is created, just for this purpose of numeric recall).

2. If the sd9 does in fact have the ability to create and store multiple (20?) individual Registrations in a single user-named Block Registration, how are those Block Registrations called up? Can they be searched alphabetically, or by artist name, or by genre, etc?

Although the ability to include midi files, text, etc, is indeed impressive, my need is to simply set and store the playing parameters of the keyboard (voices, style, tempo, transposition, vocal & harmony settings, etc) for each song part/section (verse 1 verse 2, chorus, etc) in multiple individual Registrations and have them all called up and readily accessible within a single called-up Block Registration...

Thank you again for your assistance, it is greatly appreciated...