I made what I think is a decent repair using a hot glue gun. I was originally going to reinforce them with fiberglass and epoxy resin, but my research indicated that hot glue was good for repairing nylon, so I gave it a shot. It seems to have worked out well. I was even able to rebuild about an inch of missing material using the glue a bit like a welder building up a bead. I inserted an oiled up spare reel and built up a quarter inch or so of the hot glue. That seems to also be working well.