This one cuts clean. Not as clean as the Miller 875 I used later on. But still very minimal slag. That hypertherm would leave huge slag. Tons of grinding. PiTA. I believe it was 10 or so years old the hypertherm but my boss wouldn’t let me change the tip and it was the same tip that had always been on that machine. So later on I chalked it up to that being the cause of the bad cuts lol.