This video shows a "shortcut" for installing a pair of Deckhands™.

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It takes some coordination, but is faster. 

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The gist of it is to mount both Deckhands™ clamps to the bottom section of an aluminum umbrella pole, get it exactly where you want it, make sure its level, and mark all the holes at once. 

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This saves the back and forth of each step as done in the normal instructions.

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It takes a bit of coordination, but saves a lot of time.