A simple shelf to cover the drywall covered drywall shelf. The only thing that makes it slightly more than the simple board it is – a mitre that runs lengthwise to make it appear thicker than it is. It’s 2 pieces butt joined with a biscuit and a piece of 1/4" plywood in the bottom to help keep it together. The rest is shimmed here and there with the same 1/4" ply. I glued it to the drywall shelf with some construction glue. I hate looking at fasteners.
The mitre came out great. I love mitres but they don’t always love me back.