... softly;4.Adjusting the laser point or rotating laser tube, to get the best output laser beam, then fixed the laser tube;5.Be careful ... Spare Parts to buy:Laser Tubes, Laser Power Supply, Water Chillers, Laser Controllers, Laser Motors, Laser Drivers, Laser Focus Lens, Laser Reflective Mirrors, Laser Head, Laser Pulley, Laser Belt, etc.