It is not impossible to remove, but a real pain indeed.
What you need to do is dremel tool the carbon tube on the inside so it weakens. Then you need to release/break the tube from the plastic pieces, like with a screwdriver or pliers. When you jam the screwdriver in there and the plastic flexes away from the tube the epoxy will crack and release. the plastic bits are quite resilient to bending. The middle metal piece I popped in the oven on HIGH and wait for it to make loose then grab the end with pliers and pull it out.