Very nice!
I do have to say. My Millermatic 211 is a completely different animal on 220v. Bumper shell is tacked and first two real welds are in place. Waiting for the duty cycle to catch up. Close up of the 1/4" wing and 3/16" main shell joint.
...only BJ welding on his bumper for like an hour caused it to go into thermal shut down.
I'm not popping any breakers nor have I seen the temp light. But I can tell when its getting warm by the weld bead and I just give it a rest.
The 40 will be lonely for a while
as a data point, did you disconnect the ecu?
Any particular reason you chose to mount on the passenger side swing arm?
does that big ol' tire wobble any?