I was basically thinking about fitting the top of the whole cart with the plywood basically creating a countertop. Since that lip is there, I was thinking that I could use a dremel to router a notch for it to sit in on the underside. The lip is about a 1/2 inch and I could laminate two pieces together if need be so that it doesn’t have a gap; clean up the corners and stain, bam!! Buuuut, let’s say I get the weight perfectly centered and dispersed, will the cabinet and casters hold it?