[nestorpr]

Mine also flexes but I also noticed that keeping the door closed during hard running helps keep it down quite a bit. Mine doesn't have any cracks in the area and I have no problems opening or closing the door but I do need to replace the sealant around the door frame and the fiberglass opening quite often, I'm going to start using a more flexible sealant from now on. This might be a case where too much stiffening might be a bad thing, maybe it would better if you allowed it to flex as originally designed but keep the door closed so it keeps it's shape? I really have no idea but sometimes if one thing doesn't work maybe trying its opposite might. Good luck!