I think/hope you're joking at least a bit here. I thought you said "lapel buttons", not "nuclear reactor". Maybe I read that wrong though. You would have to limit the sizes of the signs that you could produce, and SS may be stretching it for a small machine. Keep in mind, that the larger mini mills, still weigh a lot. Take a look at the Harbor Freight website to get an idea. Sherline/Taig minimill conversion may be the best bet. It will still take plenty of time, and you aren't even building the whole thing. Thought about starting with a smaller project first to get your feet wet?
Stop talking about it and do it already!!!!!
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)