The dinette seat in my trailer (Passport 238ML) is next to the door, and as such has no wall to brace up the seat back. Since this is a Passport series, the construction is rather lightweight, and I was unhappy with how much the seat back flexed when in use. I rooted around through my collection of stuff and found a Simpson Strong-tie L bracket that fit perfectly. I added some #8x1/2" wood screws to secure it without punching through the other side, and now my seat back is secure as can be. Also, you can't see the brace until you remove the cushions, and it doesn't interfere with the storage cover.