I needed a way to trim hardwood edging flush with plywood panels. Balancing a hand-held router on the edge isn't very stable. So instead, I turned to my router table. The solution is the tall router table fence you see here. The fence slips over my existing router table fence, so it’s quick and simple to attach without using clamps or fasteners.
The secret behind this fence is that the front face of the fence is about ⅜" shy of resting on the table. This provides clearance to slide the wide edging under the face of the fence. To build the fence, I just glued all the layers shown in the drawing together after I cut a small opening on one face for the router bit.