Back from the weekend, that was fun, and relaxing! I didn't screw or bolt through the side of the roof, instead i bolted it to the aluminum rail. The Skamper has a curtain rail around the edge of the ceiling. It's about 2 inches wide and about a 1/2" deep, there is an L shaped part of the extrusion, i just drilled a hole in the aluminum extrusion and bolted it to that. It's basically a built in L bracket that is solidly fastened to the sides of the roof. If that wasn't there i would have bolted through the side of the roof using some carriage bolts and rubber washers to seal it up, luckily i didn't have to do all that. 1991 Skamper 245C 1997 Pontiac Trans Sport Dad Mom Three Kids!