Some of the links in the original post don't work any more, but it looks like there's a time limit on how long a post can be edited. So, here's an updated list.
Note, many props are made of an alloy containing beryllium. Dust containing beryllium is hazardous. Here is a link to a fact sheet:[link=http://beryllium fact sheet]http://www.state.nj.us/health/eoh/rtkweb/0222.pdf[/link] When working with this material, it's important to wear a dust mask, and take steps to control the dust. I prefer hand tools, rather than a dremel, because it reduces the amount of dust generated, and the distance it spreads.