Timbrhuntr, if you have to wear a mask then I suppose that a lot of dust is flying? I have never used or seen a dremel tool used for cutting an carbon. But I have (as well as most others) seen carbons cut with a high speed arrow saw and I have not ever seen a need for a mask. I would just caution people that cut their own to be very careful. We all saw the pictures of when a carbon goes bad.