Very cool butt welding technique

Tooljunkie said

Also, find a block of solid copper, use it to back up holes you are filling in.copper wont stick. And a steel tig rod helps to fill bigger gaps.

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Copper backup block :thumbsup:
Big gaps with a stick welder, take another stick and knock the flux off and clean it up. In one hand you have the stinger and rod, in the other you have the clean rod and use the stinger as you would an acetylene torch and fill away :D