I'd like to make a narrow riving knife for my table saw for a ripping blade. As it needs to be about 2mm thick, I think that mild steel plate might deform too easily, so wondered about using gauge steel. I've not worked hardened steel before, so had a couple of questions if people wouldn't mind sharing their expertise? Firstly, am I going to be able to shape the steel with normal tools, i.e. angle grinder, files, drill press, etc? Secondly, would grinding the steel heat it up sufficiently to affect the heat treatment?