Working with carbon fiber.

[MetalMan]

I haven't had too much experience with CF, but I have done a bit of work with Garolite G-10 (same "family" as CF). This stuff is quite tough on tools. On my scroll saw I would go through normal blades (that I use to cut aluminum with) after about 3 inches, at which point they were completely dull. I have also noticed that my countersinking bits aren't as sharp as they were before they hit the G-10.