How's the foam in the seat structures? (You did find that, didn't you?) Mine still had foam there, but it was in pretty bad shape. I ended up drilling the rivets out, removing the old and installing new foam, then remounting the seats with stainless machine screws, rubber-backed sealing washers, and nylock nuts. I also added 3/4"x 3/4" x 1/8" aluminum angle under both the forward and aft edges of all seats for additional strength. It's been on a back burner for two years, though.
I was a little dismayed about how thin the sheet was that they made the boat out of.
BTW, what city/state are you located in? I'm in Iowa. (I may be able to make you a heck of a deal if it's not too far away.)
Roger