To expand on this 3-4" pin hooks more, more top weight goes longer business, that's not strictly true.
Longer pins, 3-4", tend to be laid out so that the pin is higher above the fingerline than 1-2" pins, which tend to be laid out with the pin under the fingerline. Pin height above the midline is one way to control the length the ball gets. Those pin placements for those particular pin lengths work to keep the CG close to the midline, giving a little more flexibility with weight hole placement (don't have to place it to eliminate finger or thumb weight).
On a strong asym like the TSA (or any other Morich ball), static weights are almost negligible. Get the ball legal and forget 'em.
SH