I agree with Russell and wouldn't cut it deeper either. And i suggest you to use proper spined arrows anyway, no matter if your bow is cut to center or not. Because if your arrows are spined to stiff they will hit the target to the right from where you aimed, or to the left if they're to weak. This is said if you're a left hand shooter.
BTW i don't think that you need weak spined arrows with a bow that draws 64.8@29.
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Andy