"To make the structure as strong as possible, I cut a notch on the side pieces so that the bottom could fit in like a drawer. These cuts were made 1/4" from the bottom to top, measuring 3/4" to fit the granite bottom and the plywood. On the storage side under the cutting board, I used 3/4" plywood for the bottom instead of granite so it could be lighter. The top middle surface was done in miter edge. This way, the joint looks like one seamless piece, like a box."