Corner gusset tip
Installing a corner gusset to a flat surface or perpendicular to the extrusion is
not possible with the locating tabs in place. Fear not, they are made to be broken
off with the following method.
Using a flathead screwdriver, slide the flathead under the small tab on the
bottom, and pry out the tab. It will snap at the base. Snap off both tabs on the
side that needs to rest flat on a surface.
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