What the pro's are doing now
I found this site to be interesting. It shows the 3D laser cutting with 256 shades of grey. It also shows metal cutting with only 150W CO2.
http://www.kernlasers.com/index.htm
http://www.kernlasers.com/index.htm
Building CNC Machines - Laser/Routers/Etc.
https://buildlog.net/forum/