Teetering and undersling are unrelated.
Teetering allows each blade to compensate equally for the difference in airspeed while traveling horisontaly.
No horisontal travel, no movement on the teeter hinge.
Undersling simply places the teetering hinge in the center of lift/drag, cancelling out the 2per that would be present without it as you add horisontal airflow.
Any increase in teetering angle wont change the cone angle.
Any increase in cone amgle wont change the teetering angle.
The degree of teetering angle is proportinal to airspeed differential.
The degree of cone angle is proportinal to AOA, or load.