ProActive Sports Check Go Pro Electronic Ball Liner Review

I like this product but you have to be disciplined to mark your balls in advance.Also find the replacement pens to be ridiculously high.I use a sharpie.

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Product Description:
By spinning the ball at 10,000 revolutions per minute the Check-Go automatically locates the ball's heaviest areas along its equator (finds the seam or "sweet spot")With the included pen, mark the equator of each ball and you will be playing each ball at its own unique sweet spot.

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