the way that CGRetired explained how to do it is the best way.i have been doing my golden rods like this for years.it is very important to rough the outer tube up where they pass through the formers and out the back of the fuse to get them secured.i use the fiberglass outer tubes and ca on them.i use a 256 die and thread about half inch of the end of the rod that i thread into the flex rod then add a drop of ca.you can put some pretty serious curves to the ny rod and it doesn't bind.and the metal rod on each end is the same as having a solid rod all the way.