I picked up 3 1600 Pelican cases for cheap. My plan is to mount on top of my Gamaviti rack. Originally i figured i would use U bolts and mount them semi permanently. It would be secure but it means packing the contents in stuff sacks and things like that. The cases need to be packed and unpacked on the roof which could be a pain. Then i started thinking that using simple ratchet straps would be nice and simple. pack each case and then just lift them to the roof. But then i end up with a bunch of straps that vibrate and flap on the highway. I dont plan on putting valuables in them just things like camp stuff and clothing. The u bolts with the nuts inside the case and a small padlock on the case would be reasonably secure from a theft point of view in parking lots. The ratchet straps could be removed in a few seconds if someone wanted them. Any opinions or ideas?