Yes the cover is on there "permanent" until you go to disassemble the unit which can be done in about 15 minutes. You can take the whole thing off and put it back in it's box if you wanted very quickly. I'll try and take better close up pics of that part for ya
There is foam underneath each rail of the frame so that the aluminum is not directly on the bed of the truck. obviously, my bed liner goes over the rail so I was not worry about that anyway but it is there for those that don't have that. It serves a couple of purpose. It's suppose to be a seal to help prevent water from getting in as well as acting a protectant between the bed and the aluminum rails.
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