[dominik.daners]

From what I have learnt in the RC hobby, carbon fiber in tube format is usually attached using clamps (usually made of aluminium), and people avoid drilling holes in the stuff due to the above mentioned reasons, as well as creating a weak fracture spot.
As for cutting the stuff, a dust mask and thick gloves is a bare minimum, and many people also use duct/gaffers tape around the cutting area to help trap the fibres, and to get a cleaner cut. If you want to overkill, feel free to do it underwater or in a glovebox, but keep any cuts to a minimum, and DONT file the stuff.