We have two large corbels weighing nearly 100 pounds each, 56" long and 26" deep at the widest point. They are to be attached to the sides of an existing doorway on the exterior wall ( as a decorative entry) under a small decorative roof . Another pair will be secured to the outside wall, again around a door, but will have the house roof overhang to be attached to as well. Are there any tips or tricks to this procedure that would make them more secure and solid...both for the stability of the outside wall and the corbels themselves ??? Help!!!!! they are planning on attaching them tomorrow...or soon after. Thanks, Lee