I was never fortunate enough to meet Shioda Kancho, but Aikido Shugyo does convey some of his personality and humor, which does not come through in his other books. It is a tough get sometimes, as the above website is pretty much the only source, and they often do not respond quickly (I'm told), but be persistent... The early green leatherette-bound edition with the brass corners is a prized find, one which I'm sorry to say I haven't... yet...
Hi Clark. Yes, you are 100% correct: the are a bit slow and do, in fact, need some prodding. I have also been looking for that special addition. I wonder how much it will set us back?!?!