Look at IC2's rolling machine. How many people actually enjoy such mechanics?Perhaps a device that repairs metal tools and armor? I know that's kind of a niche use, and there already is that grind stone block (which I can't remember the name of right now, it's been a while since I've used it) but it still might be a good use. Also, gas cutting was mentioned, and that may be something that could be integrated into manufacturing somehow (maybe a more steel-efficient way of making base panels from HSLA steel blocks, for example).