Has anyone installed or is familiar with the installation of a “double gate” in lieu of the tailgate on pickup trucks? It is just like barndoors but only bed height. I am curious as to how the actual hinge mechanism attaches to the sides of the bed. The one I saw advertised was made by “BlackHawk. ” Any drilling required and is it easily interchanged back to the tailgate as the need requires? I have seen this item in accessory catalogs and am thinking about it for mine. double gate