The bottom of my Back Box is saggy and by looking closely you see that there are two metal parts that hold all the tension with a piece of wood in between. The previous owner did put some screws in both sides, which really does not seem to help. When I push the top backwards you see it lifts to the normal position.

I saw another post where somebody replaced the whole bottom of the back box (https://pinside.com/pinball/forum/topic/my-box-is-sagging), but I am not so comfortable with woodworking that would dare to do such a project.

Would it be possible to put a metal plate in between? Or is there a better quick fix?