It depends on a few things. What is your PAP? What type of ball it is and how strong the PSA/mass bias is.
It depends on how far the pin is from your PAP and how the mass bias is created, i.e. if is an elongated created mass bias or a mass or plug/knob. By drilling into the mass bias, you can either increase the strength of the mass bias or weaken it.
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Formerly BrunsRico