Check out this thread http://www.stovebolt.com/bboard/cgi-bin//ultimatebb.cgi?ubb=get_topic;f=4;t=004195#000000 These are the best way to go.
A cheapie die grinder (yes Harbor Frieght has them for about $20.00) and some "cut off discs" are the way to rough cut, to get stuff off BEFORE you can get to it with tin snips. The cut off discs come in all different widths, I use 1/32" for nearly everything I do. And if you can spring for a little better die grinder do it, the cheapies cost so little because you get what you pay for.
Brian
