I would use the proper size piece of fiberglass rod blank that fits 2 inches either side of the break. Unless the break was badly shattered i would not trim it down. Using epoxy paste glue, i would glue the pieces up and let dry overnite. I would then overwrap the area with size A thread and apply finish. I have done many like this for people. My own rods break and they go to scrap, it is just personal preference for me. I think i've only broken 2 of my own rods in the last 30 years. I have been blessed with the skill to craft rods so i take a lot of pride in my rods not only for function but looks also. Nothing wrong if his method works for him, just not for me. Lots of people take pride in coming up with solutions as this gentlemen did, so kudo's to him.