Nothing all that special but something I’ve needed for 40 years and never got around to!! Keep all those leads straight and at-the-ready…
Check the hanger holes for your nails/pins. Slots are scaled for Purebond Maple Ply which measured 3.54mm, it’s a tight fit with no glue. Adjust as needed. Obviously you need two @each of the side pieces and hangers. Anyone who needs this thing is probably smart enough to know how to put it together.
Modified (see last post):