blacksmith there are a lot of good push pull units on the market. For years I had a Cobramatic, but the gun is not a whole lot lighter than a spool gun, and then when you add the very heavy cables too, it really gets heavy and cumbersome!
Where people get into trouble is when trying to use a low end Mig welder, without a very short gun, with nylon liner, and proper drive rolls. When it comes to aluminum work, there is just no cheap way to do it!
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