I have never needed technology to show someone how to control their ball flight. The harder a person swings the more backspin and the higher the ball will fly. Backspin is counterproductive when it comes to hitting a lower ball flight. I teach students to take one or two more clubs than the distance requires, move the ball back in their stance and only swing 70% of their normal speed. This will produce a shot you can play under tree-limbs with enough topspin to run onto the green.
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