Well I second, third... the camera. One of the main advantages is you see where the cutter is cutting and not have to reposition it where you need to reposition the laser if cutting on the tip or side. Like John, I am looking at the piece until I want to get to the final passes then looking at the camera. I bought my camera system with my hollowing system, Hope Hollowing system. I also have a small 7-8" or so monitor, but it is fine and don't want a larger system.