PFT Installation Expert Jared shares a quick tip on how to keep your corner post insert in place during installation. First, mark up an inch from the end of the post on both sides. Use a square and draw two straight lines for cutting. Cut up both sides of the post leaving a 1″ tab on each side. Place a cut in between the tabs to create two individual tabs. Bend both on the tabs downward so they overlap. Once you insert your corner post you will see the tabs keep the insert in place.