How would you attach a piece of matboard mounted on foam core to this and hang it on the wall? That's what the customer basically wants, (with no glazing). It's fine if we back it with gator/strainer, whatever, as long as it fits fine and can be hung. Not sure what to do, as there's not much to work with. These photos show the back of the 'frame', and as you can see, the corners aren't connected in back. The only nod toward hanging is three wee slits the engineer cut in the top of the top rail, but they're only 1/16" wide. I can imagine making a strainer with hangers, and attaching the front pieces to that, but how would you attach that to the frame? No spacers between front of frame and matboard. Must hang flush to the wall. The overall size is about 24 x 32".