John, it looks like Dan's bag is sealed at both ends. Care to provide any evidence that both ends of CE142 were ever in that condition? Or maybe Oswald believed gravity would suffice.
I assume the official story has Oswald manufacturing the bag on site on Thursday. At that time he seals one end with a flap structure and leaves the other end open. In doing so he also creates a bag with determined width and a length that cannot accommodate the fully assembled rifle. Was the width also able to accommodate an assembled rifle ie. with scope attached?
I can see no evidence of any defined fold at the open and of the bag. Would not the disassembled rifle not have allowed for a fold down of one or 2 inches?