Heh, mention of the Niton X-ray Flourescence guns reminded me of a story told me by an engineer I used to work with who toured a plant in Monterrey Mexico where they make the flame arrest baffles for air bags and other similar wire products. he witnessed a guy holding a sample of wire in the palm of one hand with the gun in the other. Apparently that is how he checks all the wire to make sure the correct alloy is used in that production run. I wnder how long before the cancer starts.....