How about a picture of the welding machine.

For other peoples info. I read that if you put a Copper bar behind when you welding thin material it decreases the chance of burning a hole through it.
I bought a bar of copper 6x1 inch 3/16 thick. And tried that using a Flux Core welder and it helps a lot. However, you have to be able to keep the bar up against the back of the metal.

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84 300D, 82 Volvo 244Gl Diesel