From the FAQ:
PAP (POSITIVE AXIS POINT)
The axis of the ball during the first few revolutions that is created totally by the bowler's release style. The point on the ball that is equidistant from all points of the release ball track.
AFFECT OF PIN PLACMENT
Pin to PAP distance:
0" - minimum flare potential, core is in it's most stable position, earliest roll with smoothest arc.
1 1/8" - 1/3 of flare potential, stable core position, earlier roll with smooth arc.
2 1/4" - 2/3 of flare potential, semi stable core position, early roll with strong arc.
3 3/8" - max flare potential, most unstable core position, medium length with the most hook potential.
4 1/2" - 2/3 of flare potential, semi stable core position, late roll with flip/arc reaction.
5 5/8" - 1/3 of flare potential, stable core position, later roll with a flip reaction.
6 3/4" - minimum flare potential, stable core position, latest roll with strongest flip.
Remember : These reaction charcteristics are all relative to the conditions they are being used on and may not perform as expected due to burning up too early or not setting up early enough.
Pin to grip center (GC) distance: The higher the pin above grip center the more lenght you will get fot given pin to PAP distance. The placement in relation to GC also affects where the tracks of track flare intersect (bow tie).
Higher pin = Higher intersection. For this reason they suggest high trackers place the pin higher above GC to reduce the risk of flaring over the finger holes.
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FAQ:
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