Interesting, thanks. I’ve never done anything like this before, so I am at a loss of the process. So are you somehow tracing the .JPG? That would do the trick. It doesn’t have to be a prefect replica model, but should be symmetrical, otherwise I’d scan it. I’m going to machine this out of aluminum (minus the extruded lens area) and naturally do some manual hand work. I also wanted to make a template if possible (at least of the profile, minus the extruded lens area). Would you mind telling me the process? I understand what the 3 commands do that you listed. What command would I use to do trace welding hood (green line in the grey box)? I’m not sure how you generated the surface used for trimming? Is it a extruded Polyline? If I knew what I was doing, I wouldn’t be asking for help.