Since my initial posting in Dec 2020, there has been progress on the breadbox. I went from the rough sketch to the final design. The frame and panel on the side moved to the front. For making this, I don't need any further detailed drawings as many of my other projects have contained this type of joinery. For some of the dimensions (overlap of top, length of legs that lift the bottom off the counter, etc) I will need to make and see what looks proper. As for the thickness, I am going with 3/4" stock. It might look better in 1/2" stock but I have no way of easily knowing until I start building it.
I had some cherry and maple left over from other projects so I used what I had at hand. I like having some wood in stock at home but I don't want it to get out of hand. I used my favorite holdfast for much of the cutting. Two of the rough sawn boards were perfect size for what I needed. That made me happy.