Are you saying that they can not be expressed in words? If so, why bring them up, in an on line discussion, at all?
My original question was and is a question purely of stylistics and not of principle. You can perform Koshi Nage with a wide stance, a narrow stance and in fact you can even do it balanced on one foot. Hip positioning is a principle, foot placement isn't, it's just the result of placing your hips correctly. IMO of course again I do not claim to be right here.
All Aikidoka I have met use a wide stance, the association I belong to, as far as I knew at the time, were the only people using a narrow stance, and I was curious to know if we were the only ones using a narrow stance.
Now I know that it's actually quite common.