PhilR wrote:
Thanks for all the input. The camper roof is raised near the roof hatch opening that is used for the ac install. When the 4 long bolts are tightened and compress the 1" gasket, the ac unit is drawn down to the "stop" mark and that is the only contact with the roof. Because the gasket is at the front end of the ac unit, the back end is cantilevered almost 2" off the roof and unsupported. This is a low profile unit and is 3 to 4 ft long. The unit has 3 pads similar to the gasket materiel that are fastened to the underside that appear to be intended to support that end of the ac unit, but are too thin, leaving approx. a 1" space. I think that I should look for the same gasket materiel and glue it to the existing pads so the unit is fully supported.
That is what I would do, just to keep the AC from ocellating front to back.