As you have now learned, SURFACE is everything. Drillings, no matter how much people harp on it, is a far distant 3rd or 4th factor!
I'm afraid that Surface is still at least 60-80% of a ball's reaction and drillings are maybe 20-40%, at most. With today's incredible cores, drillings have assumed a greater percentage, in my personal book, but are still a distant 2nd.
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"We get old too fast, and too late, smart."