There are two drills where you isolate your swing to get used to letting gravity do the work. Both involve standing just behind the foul line, ball side foot slightly behind the slide foot. One starts with the ball at your side and you swing the ball toward your target and then letting it swing back and then forward releasing the ball as it passes your slide foot ankle. The second starts with the ball waist high and being pushed out in line with the target. If you have ever seen the pro bowlers doing trick shot competitions these are very close to what Tony Reyes does with his one step delivery.
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