Geoff Mangum, author of Optimal Putting: Brain Science, Instincts, and the Four Skills of Putting, and creator of the PuttingZone, has gathered up all variations of golf training aids to find out which work, and which don't. Not only will he save you from wasting your money on useless devices, he demonstrates how to create your own, affordable and effective training aids that will guarantee improvement on your game!

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