After ribbing Steve about his setup, I realized his “back-to-basics” approach deserved a closer look. As I said, his fence is nothing but a straightedged board with both edges are jointed straight. However one side is notched with a dado blade or Forstner bit to provide clearance for the router bit.
The notched edge of the fence for profiling the edge of a workpiece. I sized the notch just slightly larger than the diameter of the bit. This provides the maximum support for the edge of the workpiece as you’re routing.