A little more info would be helpfull . Things such as PAP ,lane surface bowled on etc. As the 3.5 is a strong ball i would probsably go with a 4.5-5 inch pin to PAP distance. , a 50-60 degree drill angle and a 40 degree angle to the VAL. This would give you good length with a strong but not snappy backend reaction. This would be a pin up drilling with the mb just right of the thumb.
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