2nd Big Jim's, easy to use and works on alum. carbon, and wood. He has a video on it, give it watch.
Have you changed shafts? I have good luck with glue adhesion in Gold Tips, and a little worse with Carbon Express Heritage. Have had good luck with CA glues and 30 minute epoxy. 5 minute epoxy is not as good. Also those heavier brass inserts don't glue as well as the aluminum inserts. If the JB Weld is old I don't think it works as well either.