The Tweeks one looks ok. But it sure looks thick in the picture plus they do not tell you the pin diameter. There was no jack pad like that when I started out a few years ago. The Tweeks one makes sense if it will fit your jack and slide under the car.
If you put in 9 quarts you are full. Sure you did not forget to put the drain plug back in?
There is no reason to have the level right on the full segment. Drive your car and check the gauge in the morning.
