To be just a tiny bit picky. I would recomend against scraping the shaft. That works great with aluminum, at least those shafts with harder anodizing, but scraping can harm carbon.

I'm being picky, because technicaly, a scrape cut is one where the bevel is off the surface being cut, and the cutter isn't restricted as to how deply it may cut. What you want with a carbon shaft is to set the knife bevel flat against the shaft, and carefuly cut away the glue, so no nicks occur. Any nick that slightly nicks into a carbon arrow should be considered cause for it's disposal. so be careful.