While using my new mitersaw, it quickly became apparent that the machine was only capturing half of the dust it created, even when connected to a shop vacuum. This simple fix greatly improved that collection efficiency.

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I cut a 532 "-thick scrap of rubber from a discarded insulating mat used by electrical linemen—any thick but supple rubber will do—to the shape shown to fit my mitersaw. (Your saw may require a slightly different size and shape.) Drill a hole on each side of the saw's dust chute and attach the new deflector with nuts, bolts, and washers. The pliable rubber bends harmlessly out of the way if it touches wood during the cut.
—Randy Iamurri, Saginaw, Michigan