Science & Motion's SAM Puttlab attaches a small plate to your putter's shaft, the Y - shaped machine uses ultrasound to track the club as it moves. This helps determine grip size, putter face lie angle and length of shaft for best putting results.
Switching back and forth between brands and models is never a good thing as it contributes to a lack of consistency. You should use the same one every time for the best opportunity to shoot your lowest score. I will ask my local professional for advice for myself.
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