Hi. I just bought my machine. Have not tried it out yet. I have a question. Has anyone tried metal engraving on this machine?I know it says NOT FOR METAL. But aluminum is very soft. If I use a metal cutting bit. Use the smallest depth setting. Do you think I can get it to work?I make throttle plates for cars.The manual engraver is slow. I thought this would be a fast way to make them. What do you guys think? Here is one of my plates.