Huh? is right.
There is minimal difference between a 2-3" pin and a 3-4" pin. If they just put the pin where it needs to be and then use a weight as hole as it should be (if properly placed it can be used to add more and earlier flare to help you get it into a roll earlier.), then you'll be just fine.
Bottom line: find a real driller, an IBPSIA sanctioned/certified driller, who knows their butt from a hole in the ground. (bad paraphrasing; hope you get the point)
(It seems to be, based on what you have said so far that) our current driller does not know enough to run a pro shop. (Emphasis on the word, "PRO"!!!!) )
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"None are so blind as those who will not see."
Worrying is like rocking in a rocking chair: it gives you something to do, but doesn't get you anywhere!"