To get an accurate PAP you should use a non-flaring ball, like plastic with a pancake core. Then when you mark the PAP with a piece of white tape it should appear stationary all the way down the lane.
With true low trackers, placing the pin in any position (such as positive or negative thumb quadrant) that lowers the track's bowtie and reverses the flare will cause the later track rings to be located in the area where the normal early flare rings for a high tracker are. Does this improve ball reaction or carry? I can't say, maybe someone else can chime in. -- JohnP
