Peter A Goldsbury
...(I also have a tape--never published--of Rinjiro Shirata doing loads of variations.)...
Perhaps this might be a project for a Ph.D in budo history. I doubt whether there would be much enthusiasm for a new general edition of Budo Renshu. The Shirata tape was never published because Kisshomaru did not agree. He wanted to emphasize the new beginning and to systematize aikido into an art that could be practiced by anybody. Actually this is the main message of these columns I am writing...
You're preaching to the choir here (ref. my signature below). I know the series of videos you are referencing, and the curriculum goes deeper and more basic than even what is shown on those tapes. But all of that is just talk for me, I've barely scratched the surface and it's slow going.