Here are the pics:
This is a standard 3 o'clock grip from the top.
This is a standard 3 o'clock grip from the side. The wrist is arch down and the palm is vertical orientation.
This is the building of the 3 o'clock grip.
Here the thumb is not yet rotated to the pad.
Here the thumb pad is in contact with the rim, and the fingers are working against the thumb. I can taco the disc from here.
You can see the disc is parallel to arm, and below it. The disc is not in line with the arm.
Here the disc is naturally arched down to create the nose down condition.
I have tried the thumb further way from the fingers. I like the thumb nearly touching the index finger the best. Not like this.