Get a drill bit that is just barely the diameter that just fits inside the carbon shaft so that it will still slide inside the shaft and put it in. Then, as hard as you can, swing the arrow downward so that the drill bit travels from the nock end to the insert as fast as posslbe. It is like you were trying to sling the dril bit out of the arrow shaft if the insert wasn't in there with centripetal force. Doing this over and over again "jackhammers" the insert loose fromt the shaft. When you see the insert is just about worked loose, watch where you sling it carefully because it can come out with great force.