Well, the glue is dry and the display case is out of its web of clamps. With the help of a friend (thanks Ed), I got a sheet of nice luan plywood on the way home after dinner. I've now cut it to size and fastened it to the display case. All that's needed now is some touch up hand sanding and three coats of water-based polyurethane. I even got the plexiglas that will become the sliding doors. Here 'tis.