Once again TDK6, I never suggested tightening the arc but rather continuing the arc.
From apex to apex? I will try.
From the maximum edge angle, probably just after the fall line and a relatively taller stance, I would begin shortening the outside leg while continuing the turn and decreasing the edge angle. this is where I begin to push the outside foot forward keeping pressure on it (key) to simultaneously pull the hips across the skis and square them up to the feet before the skis reach flat (flat being but a brief fraction of a second passed through). (This movement tends to show the torso following the skis a bit more at completion leading to a bit earlier counter at the top of the new turn.) As I get near flat to flat I feel a slight and simultaneous (not overpowering) twist
of the feet up hill (in actuality they do not turn up hill but the motion keeps them in the last turn until the last possible moment) and the pressure moved under the heels, as I release the edges and tip
the skis into the new turn (twist 'n' tip), newly dubbed, "The Dairy Queen" effect .
At this point I begin extending, pressuring the shovels into the fall line where the pressure moves to centered under my feet ready for another snakey turn finish.
There is no jamming, rather a kind of virtual bump absorption at the end, a kinda replemond.
If we were to take a photo of the skier performing this type turn at edge change it would show an extreme upsidedown position with early knee angulation (before the extension has occurred) and the pressure forward of the toe pieces and the hips inside the new turn with a slight counter.
I really suck at drawing clear images with words, sorry.