In Chapter 9, pages 62-63 of my eBook, I describe the making of the beveled-edge drawer bottom for the Chamfered Post Table.
I've included a short video of the process of building this drawer bottom in SketchUp. At first you can make the beveled edge shape or profile in place on the drawer assembly. Then extrude this shape to exactly fit within the grooves of the drawer sides and front. To complete the bottom faces, requires only to fill in two lines at the back edge.
Here are pictures of the SketchUp model of that drawer and drawer bottom.
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