I doubt mine is going anywhere. Each of the five feet is screwed down with
three screws and there are screws up into the rim timber at about 6"
intervals all around the rim. On three sides, the support timber is fixed
firmly to the wall and on the fourth side, it is held up by 2" x 2"
well-jointed framing, which is screwed to the floor.

I bet the sides bend, though!

Also, the metal one you just put on the floor. Job done.

Christian.