Jim check Craigs List every now and then or at the dump and pick up an old kids swing set. Then suspend your sifting box from it. Another option I use is a set of king size bed rails that can be reconfigured into an similar style swing set frame. This can be made to fold up too. Mine stays out in the woods now or I would take a few photos. to show you. I got tired of reparing the rigid frame types on legs.