I have known for a long time that the main line of Aikido does not focus on truly effective techniques. I experienced this in various seminars that some Hombu students attended while I was in Japan and some other Hombu style seminars I have trained in. Their techniques look similar, but the results were not as consistent with lock-down efficiency. Recently I have discovered that the headquarters dojo, the Aikikai Hombu Dojo, deliberately changed how techniques were executed in order to spread Aikido around the world. It worked, Aikido is around the world but the changes frustrated the founder of Aikido, perhaps causing him to develop a cancer. One day a student asked O'Sensei about the effectiveness of the techniques. In a fit of frustration O'Sensei told him, "The Aikido being taught here in Tokyo is for exercise. My Aikido is for the battlefield. If you want to learn my Aikido go to Iwama and learn from Saito."