That is one of THE best stick welding machines I've ever used. Place I worked at had one. When the weldors had to in house test for CWB or Hydro that was always the machine they'd use if they could.
The pulp mill up the road from here had one. We burned that one up.
Was a major rush job on their big truck dump bearings. Two days of 24 hours straight...just gouging to get the thing apart. We ran 1/2" carbon on that thing steady at about 500 amps. It made a huge ball of smoke after a day and a half of that.
There wasn't another welder on the place that could put out like that one.
I have tools I don't even know I own...