This may be a stupid question but it's something I have wondered about. Is there a purpose of the inner sail panels on a 5th gen? (the ones that are attached to the body and held on with 2 screws on each side of the rear window) I guess maybe not a purpose, but why are they there? To me it would make more sense if they were actually part of the inner bed panels and attached to the roof. Seems like they're just an area that would trap water and debris which could lead to rusting and interior leaks.