i have a 1972 airco 200 amp "dipstick" [fits me pretty good, eh ? ] welder. i bought it used.
works great ! only two liners since i have had it. [a liner is the "spring" looking thing the wire runs in inside the gun cable]
ran a bunch of 44lb spools of .030 and .035 wire through it.
the only thing i don't like about it is it's size. and it weighs a ton as well. glad it's on wheels.