[hwntundra]

Mine is nice and snug. You can adjust the screw in front. They say in the directions about 1/16 play between stopper and large screw. When it hot outside, open your tailgate and slide in with a flashlight and check spacing by moving the header to see how much play you have. Kinda a pain in the azz but necessary once in a while to help with longevity of the tonneau cover. Side tension is easy with the velcro. On the highway I can easily see 2 bars on mine @ 60 mph.

Hope this helped some....