Here's what my friends and I have figured out is the best way to do this. Bear with me, I don't always get my point across with written directions... Wrap masking tape around the fork where you want to cut it, not with the tape edge on your cut-off line but so your cut-off line is drawn on the tape. This will help the steerer from not splintering. Use a Dremel or other such tool and a cut-off wheel. If you have to use a hand saw, use a very,very fine blade or you can do a good job of f**king up a $400 fork by splintering the hell out of it! Carbon dust and fibers are VERY nasty suff and can be extremely sharp, so you really want to wear goggles, a dust mask, gloves and long sleeves I hope this helps. Let me know how it turns out!