Forgive me for butting in on your jointing method using metal rod. But most stick repairs are where the metal has split the stick and come out the side. I make Country sticks such as Shepherds Crooks that catch sheep and are banged on the ground to move the Sheep. Other sticks are Beating sticks that are used to frighten game for the guns to shoot. these are banged on trees, bushes and the ground, so good Stick makers here use the dowel method.It's simply a 13mm hole drilled in the head and a 13mm dowel carved on the stick, stronger and safer than the metal and easier to do. Dave