Need to remove an unsightly knot or repair a split in your workpiece? A butterfly (or similar decorative patch) is one of our favorite patches for these flaws. Use a trim router to remove the material, and to cut out the patch. A trimmer works great following a template with a top-bearing bit or guide bushing. When freehand routing, as shown, the trim router, using a straight bit or downcut spiral bit, feels like an extension of your hand. Cut out the butterfly first, trace its pattern over the flaw, then cut away the recess starting in the middle and gradually routing toward the lines. Cut crisp inside corners with a chisel.