For more info, visit billiards.colostate.edu

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NV 3.10 - Using the 30° rule to check for and prevent a scratch

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The video clips illustrate various techniques and principles presented in the book. 
See the book (external web-link) for more details and further advice. 
Complete list of these videos are here (external web-link)

For more info, visit billiards.colostate.edu