"kitchens etc." kitchen_cabinets@work writes:
"John Gilmer" wrote
|I have used the various methods of tightening the box:
|the "F clips," and the extra screw driven "sideways."

F-clips ..............better known as maddison bars

Someone suggested F-clips to me for a similar problem.
I inquired several places about such a thing and
nobody had ever heard of them. Where does one get
the clips?