How much flex should there be in the seats? I crawled into my boat for the first time while it was on the trailer and the seats seam to flex alot. If I push down in the middle of them it maybe only takes 30 pounds of force or so to flex them quite a bit. There are also alot of cracks on the backside of the seat (where your lower back would be). Is this normal? I have never owned a fiberglass boat so I have no idea how solid things should feel. The whole boat seems like it flexes quite a bit when you get in it. It is a 1990 mod 2. One of the seats has an access port in it, I took some pictures. Everything looks ok, I'm just surprised there isn't any wood supports or anything along the length of the seat. Is this normal?