I've seen 90% of injuries occur in aikido not by produced by some nage on uke, but on people all by themselves, rolling or falling or stepping in some way that screwed them up. And in almost all cases, it was the result of unaligned movement. And I don't mean just that particular movement, I mean a lack of overall alignment in all movements - all the time.
Not disagreeing here...just a question..... In moving forward, backward and especially in turning......how do you keep the lateral movement out of the knees as they bent and unbend, the legs carry the rotation of the upper torso, the ankles handle a certain amount of torque going into the feet, the feet handle the interface between the body as a whole and the grounds surface?