Not a good idea. Tubing cutters work with pressure as well as a cutting wheel.
This will cause fiber seperation in the area of the cut.
:confused: "I just mark length on arrow, slide in a long brass insert and cut off slowly with a tubing cutter, slightly tightening with each round. Swipe with 200 grit sandpaper to smooth. dozen arrows cut in 10 minutes."
Get a high speed cutting tool, or pay the minimum fee at a pro shop, and get them cut correctly, it will save you money and headaches in the long run.
I don't know of any arrow mfgr who recommends cutting carbons in this manner.