Posted by: harry0244 on Jun-20-12 10:48 PM (EST)
When I got the tracks for the roof of my truck, the instructions said to put the outer edge 4 inches from the crease line above the doors. I put them 1 inch in, and if doing it again, would put them 1/2 inch in. The "problem" was inner panels to strengthen the roof below the outer skin. Setting the drill stop to just penetrate those, made things easier as the bottom of the expanding nut was supported when starting to tighten the installation screw. You do have to make sure there is enough room for the nut to expand above the inner steel.