Attach a small temporary piece of wood to the flat surface of the cradle at a 45 degree angle to the saw blade. You will use this auxiliary fence to make angled cuts on the framework side panels, essentially to remove the forward corners as a decorative touch. You will also use the fence to angle the tops of the bin's side panels as a transition between the shorter back and the taller front panel.

Note: Adjust the saw blade at a 45-degree angle to cut the narrow upper edges of the bin's front and back panels to flow in the same plane as the side panels.