Hi Keith. I was interested in your description of unbendable arm. Is that how people do it? Is that the general concensus? If so it would make certain things make sense to me.
As I am sure you are aware it is a tohei method, as a ki aikido man yourself you probably know more about it than I do. Wouldn't know what the concencus is, that it just my limited understanding of it. We don't actually practice it very often.
If you have a different or another explanation feel free to elaborate.