I like re-examining these topics. Keeps my head in the game.
Italia, I was thinking and I'm just wondering about straight and level. The tail is back there doing it's thing, we're coordinated. But you're coordinated because it's back there maybe doing micro slips and micro skids and corrections, if you like.
As to a descending turn with no elevator:
I totally agree, that's weathercocking effect. But "while established in a coordinated turn", weathercock effect is not present.
You're banked in a turn, the plane is constantly in a "new" slip because it's always under acceleration if it's in a turn. Weathercocking effect is
always in present and that's why you are coordinated and turning. The forces that caused the initial slip didn't go away, they just have a new vector.