Razzmeister - can't just add a fiber source to a CO2 machine. You need a proper metal cutting head and a controller for it. It's heavy so you need servo motors to move the gantry. You need to run the fiber, gas tubing and water cooling tubing to the head. By the time you are done you might as well have bought a proper fiber laser cutter. BTW, the fiber source is the expensive bit - a 500W source will set you back app. USD 10K.