After 3 weeks, still unable to laser glass with 5W air-cooled UV laser. Focused 1-2 mm +/-, using red dots. Freq's.20-40 , Spd's.:100-300, Hatch: 1.0 - 5.0, LPI: .01 - .04. Unable to get a material test for settings. All other materials - spot on. Using Lightburn.