I try to use air tools when I work with CF. I just use a die grinders with cutting wheels and wet cut my parts. It really cuts down on air borne particles. I have also counter sunk holes for screws. My battery tray is mostly CF and I had to counter sink the screw holes for the screws that go into the standoffs. It's taken some bad hits, but hasn't cracked yet. I would recommend using sharp bits though. CF does splinter pretty easily. I also use the biggest screws that I can for any particular application. It helps to spread the load out over a larger area and lessens the chance of stress cracks.