Almost SETTING MYSELF ON FIRE ! while welding an aluminum fuel tank,

This was supposed to be an easy job, weld 2 threaded couplings in and a piece of angle on and oh yes, remove and plug this sending unit ..... Well, in the process all the sudden things caught fire .... even though the tank was purged with argon ... it was an interesting day. Thanks to ‪@rockmountwelding‬ for the Neptune tig rod, ‪@edgeweldingcups‬ , ‪@usaweld‬ with all your tools, accessories and filler this job was so much cleaner and easier then it would have been 15 years ago when I was still welding in the dark ages of welding.