longroller, you have no profile so not sure how you throw the ball. Remember that "lift" as mentioned above these days is "up" with the fingers but with your hand/arm out over the lane. It SHOULD not matter how far your finger tips are in the ball, unless the ball is falling off too quickly. As long as your thumb is clear as you begin your finger rotation, then the length and speed of the finger snap will determine your rev rate. If you rotate from 6 o'clock with the fingers to 3 o'clock you'll get less revs than if you start with your fingers at 9 o'clock. I don't want to bore you as I don't know your experience level but you get the picture.
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Just bowl!