Had the same problem lately in getting a dozen new CX carbons set up. I ended up going with Gold Tip "Tip Grip" for my insert adhesive. It's a cyanocrylate (super glue) based adhesive but seems to be a little easier to get out with heat.
For bare shaft tuning, I put a very small dab of the Tip Grip right at the point end of the insert. When I needed to remove it, I just screwed a long field point in and used an alcohol burner apply heat to the field point. Do it gradually and use pliers to grip the field point until the insert is heated enough to pull loose.
I don't believe the amount of heat necessary is enough to damage the carbon, and you're trimming away the part that gets heated the most, around the small glue joint right at the end of the shaft.