So I'd like to look into a laser cutter...(even though I barely got my OX cnc up and running) What are the differences in the diode blue lasers and co2 tube lasers in cutting power, focus, etc? Of course to the newb like me a 15watt diode sounds better than a 3.5watt or 7 watt one. But I noticed the wavelength of the laser changes. Does that mean it's not a fine? Are diodes focus-able? Are co2 lasers? If there is already a post or website that explains off of this already, please post.