Think there is another metric and that is during acceleration.
Would that then pull the ball away from the coupler back side to transfer the
loading to the coupler front side?
How much is the force during acceleration and will that over come the tension
of the plastic springs ?
Would there also be enough force to repeat this during the drive? Guess dependent
on the frontal area of the trailer and other drag vs the TV pulling to a higher speed
With my setup and the controller leading the trailer braking, that would also
have the trailer pull the coupler off the back side.
Also assume the contact area of the plate steel hole and the ball tail end would
not work itself. That the contact area is sufficient to distribute that constant
load change from working the metal contact area.