When I work on a seat with a seat-a-lator, or a seat with springs for that matter, I add one more step to what Dusty did. I put a piece of seat decking over the seat-a-lator or springs so the seat-a-lator or springs won't cut into the foam. If you look at the inside of the foam, you will see that it gets cut by the seat-a-lator or the springs. A piece of seat decking prevents that.
No one lives forever, the trick is creating something that will.