BTW, no such thing as "dropping your shoulder", per Mr. Clifton, except in extreme cases where the shoulders actually end up 75*-90* perpendicular to the floor. If you were to keep your shoulders parallel to the floor, you wouldn't be able to bowl.
Your drift is a natural brain-body reaction to your perception of the lane as you approach it.
BTW, where do you start your approach? Dots farthest from the foul line, dots nearer the foul line, or somewhere altogether different?
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Nut Proud owner of a 1046/4 series courtesy of Columbia 300.
None are more hopelessly enslaved, as those who falsely believe they are free....