First, sorry for the blank post.
It sounds like you are worrying about the possibility of a break in the future.
If you're happy with the comfort and position (distance off the hull floor) you could unbolt it and fashion some closed cell foam for under the seat and re-install it. Make it a snug fit so you actually have to press down to get the hangers in position. Leave a space down the center for water travel. This way its not just hanging there.
I'm lazy. I don't repair things till they break.
The Aquanaut is a wider boat which forces the seat attachment into a different position.
The Connyak BBS