I know that there are plenty of Soft Roll Up tonneau covers on the market. Currently i am looking at the Extang FullTilt. My question is, that the Fulltilt as well as the rest of the them, still allows you to open up a corner as you want, rather then lift it open or roll it open But, is there a cover out there, besides a hardtop cover, that cannot be opened up at the corner or rolled open without having to open the tail gate which you would have to do to raise it. Kinda like an added security measure. So they cant get into it without needing to open the tailgate first, which obviously can be locked.