Back in the seventies I trained a little with a guy, Joe F, that had studied under Shimabuku. Joe was incredibly difficult to spar with, very talented, very strong and very different. His stance was unlike any Okinawan stylist I had met before or since. It was more like a Capoeira/Kung Fu corkscrew stance. When I say "corkscrew" I mean with right leg back and left hand forward. I asked him several times about his stance and who taught it to him. He always said "Shimabuku". I'm not really sure if it was Tatsuo or Eizo. When I mentioned it was different than Okinawan stances I had been exposed to he always said "Shimabuku taught a lot of different things and trained people differently." He also mentioned that Shimubuku frequently did his Katas differently, changing them up at times. I wish I could remember more about this, it was pretty cool.