Too much verbiage from me, I know, but let me add two more things.
When examining O'Sensei's "transmission" I find keeping in mind two things very helpful.
1. Fujita Shihan has said that after the war, Morihei Ueshiba didn't have uchideshi.
2. Before the war, Morihei Ueshiba's deshi were all young, unmarried and from wealthy families. If they had been born in England, they would have matriculated at Oxford and would have spent their time worrying about getting "rusticated" for one offense or another.
