I have a '05 Fleetwood Valor 3951 with the 3 piece Alumitite roof with the roof rails. The rail on the passenger side, toward the rear, separated from the roof awhile. Any water that pools in the corner where the separation is, leaks into the popup. This weekend I am going to take off the rail(s), put Eternabond along the seam and reinstall the rail. However, in lieu of gluing down the rails, I want to use roofing screws. I swore someone else has done this, but I can't find their post. I would like to know the length of the roofing screws. It looks like 1" could be the smallest I can get. Does anyone know if that will go through the ceiling inside? What is depth do I have to work with? Thanks!