I just put a new lens in my Speedy 300 80w and it is flaring up a lot. I have my air assist turned on and I use an Atmos Exhaust system. The replacement lens is made by Design Research optics. I know some other use them for lenses and I was wondering if you experience this too. I am engraving rubber for stamps. I ended up putting the old lens back in because I could not get it to stop by changing the settings.