The purpose of the Footblock Glide is to float over the matboard. The screw that holds the Glide into position should not protrude beyond the face of the Glide, nor should it be over tightened (tight to the point that it does not allow movement of the Glide). If the Glide is not allowed to float, it can mar or scrape the mat and wear unevenly. If the Glide wears unevenly, there could be damage to the mat face when cutting a V-Groove.
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