Has anyone replaced the foam in their seats? Our dinette bench seat seems to be going a little soft. Trying to decide on which foam to use I think Reflex 40 or a firm foam may be ok but not sure. When checking the seat we found that a long slot has been cut to allow a piece of the top cover to be pulled through, giving a sculptured look. This also means that the front edge has begun to droop as the foam goes softer. Again, has anyone found an answer, as drooping is not popular and is making my wife unhappy.