Mine is old enough it was called a 130T but the input at rated is the same as the 170, was before they got in a race to glorify the numbers.
srmofo, have you got your unit yet? I can tell you its about 10% or a pinch more poop than the 180 Lincoln that we are talking about, you can tell a little on the top end if you wring it out. Its got a good arc, there is a spot or 2 it could use another gear in but its not bad and you would really have to work to find it.
We field tested the earlier version before it hit the market, had the meters all over it, since bought a new DC amp meter but we were pretty critical and it took all of about 10 seconds to see it was a fine machine. I used the Lincoln as a comparison, ran them right next to each other, back and forth. Unless I had a real steady diet of auto body run 030 solid in it. No reason to jump to 035, it will run it but doesn't help the top end much, the designer tuned it for the 030
BTW, tailor made circuit for these is a 10/30 but they are allowed to be on circuits to 50A