Balls with long pin-CG distances generally take longer to go thru the cycle (sskid, hook, roll). So they tend to be further down the lane before the turn over; so, they have more backend, all other fatcors being the same, than balls with shorter pin-CG distances. The difference is usually not extreme, but since yours was, I'm almost surprised that yours worked that well. Great bowling, by the way. Congrats!
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"None are so blind as those who will not see."