I always glue the fiber guards into the jighead after the head is poured. Since I am going to trim the weed guard anyway, I glue the non-fused end into the jighead. Before applying the glue (Loctite Super Glue Gel) necessary, I do a test fit. If necessary, I will pull out one or two of the fibers to get a perfect fit. Once the glue has dried, I use small side cutters to trim off the fused end.