As I have said before I have a 94 Boomerang, I have question about the seating. Is there supposed to be a seat across the back of the boat? Mine doesn't have one, but tonight I came across a couple of ads that show a rear seat in it. If you do have one, do you use it? I was thinking about adding seats there but after putting the boat in the water I was afraid that the people sitting there would get too wet. Any thoughts?