I have the HF 220v one. First one worked great for the first few hundred welds, then started to loose power for some reason. Took it back and the new one was always on. Switch was busted, so it went back. Got another and it is working great. For $159 it was worth it. They have different arms on the web site, but not in the stores. I think I might order them. For doing what you want to do, they work just fine. Alot of the ones that are more expensive are the same things, just have a brand name on them. Most of these tools are made in china now. You might as well save your self some $$ and get the cheap ones. If it brakes get another, you will still be money ahead. I have taken Harbor Freight up on the lifetime warranty a few times and have never had a problem, they just give me another tool. I can send some more photos if you like, of the stuff I have used it on for the Unimog I am restoring.
