Summary this is an add-on for the 3dpburner original files. it allows you to set the level of your laser without unscrew the laser. it works with any laser, but it is set fot a 2000mw laser you can find on aliexpress: you will need a: 63 mm axis long and 3mm diameter 1 20x3 mm screw 1 3mm nut 4 12x3 mm screw optional: 2 screws to block gears on axis the cable guide part is just insert on the fan. If you use the X axis switch you will have to compensate it, cause when the laser is in low position, it touch the arm of the X axis preventing the swith to work. Print Settings Printer Brand: RepRap Printer: hephestos prusa I3 Rafts: Doesn't Matter Supports: Doesn't Matter Resolution: 0.2