I am the new owner of a machine engraver and I wanted to understand which steel is best used to cut precious metals like .925 Sterling Silver, All karats of Gold, and base metals like copper. I am not new to machine engraving as I learned on a Lindsay and I currently own a Pulsegraver. I have tried to search for this answer before and I couldn’t find a post addressing it so forgive me if it’s already been asked. Thank you in advance. I’m excited to start using the new tool.