How To Make A Screwdriver for Your Needs

I have many torx screwdrivers that I will never need and have decided to put them to good use. There is a screw in the Wiimote that requires a triangular screwdriver so I'm just simply going to grind down the edges to make it triangular. I have also needed certain size flat head screwdrivers in the past and have grinded down the torx screwdrivers to make them.