Carefully, they are probably epoxied in, which requires a bit more heat than hot melt, but it can still be done. You can't heat the carbon shaft directly without doing damage, so what I do is screw something into the bushing, I use a long aluminum broadhead adaptor, you could also use a fieldpoint and heat that with a very localized flame, I use a alcohol lamp. Heat a bit and pull hard on the adaptor with pliers until it comes out. The aluminum adaptor works great since it tranfers the heat fast.