They way I was told, which worked was as follows.
First throw a low flaring ball, down the middle of the lane, to pick up as much oil as possible so its visible.
Set the ball in a ball holder or an ashtry with the fingers facing up, not down, with the oil ring paralell to the table.
Mark the very top of the ball with a piece of tape. Throw the ball, if the tape stays stable, in the same spot for the first 15-20 feet of the lane, thats your PAP, if not, adjust the tape and try again. Then measure out to the right (for a righty) out to how far out the tape is, and measure from grip center, up to how far up it is. Sorry if this is complicated, but this is how I was told, and how I did it.
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16 years and still going strong! 16 years old that is!
The names Warrior Princess, Xena..Warrior Princess
And why would I "saw" pins in half, THATS A WASTE OF PINS!