Hi, New to the forums and also I'm mew to laser cutting. At my work we have a Bystar 4020 6000w the laser isn't to old "i can't remember the hours in up time", but I know it's 4 to 5 years old. We cut every thing from 16ga to 1" m.s. and 16ga to 5/8 304 & 316 stainless. The problem I'm having is...