Quote Originally Posted by John S View Post
I think the pro's use diamond coated tooling for it.
Does that make me a pro

I've cut carbon fibre sheet lots of times. By far the best cutter I found is those cylindrical diamond coated cutters you find in rotary tool kits:

http://www.ebay.co.uk/sch/i.html?_tr...&_sop=15&_sc=1

Here's a video of one of these cutting:

[Ok can't find that, will post when I have]

E.g:

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It's a bit slow (300mm/min @24000rpm if I recall correctly), but the cutters last a long time and since it's effectively a grinding process the finish is excellent.