All talk
Weather cock effect has never been mentioned in my presence. The only sense I can see in it is a weird way to say a balanced turn or the effect of a tail fin if you allowed an a/c to slip in during a turn. As for a balanced turn without a rudder or fin even, I guess all you'd need is some nice variable drag on the inside wing.
The tiger moth was a scream for eg. as the stick got to about half way over the outside aileron (going down) started coming up again. (lessen the drag I guess.)
And practically speaking, during my constant rate medium/steep turns,
ailerons went a little opposite, rudder went about central with an opposite (up)tendency, and elevator was well back. (Regardless of theory.)