I've been piddling with a tube-style bumper for the rear of my truck and had a question. I have access to a 250 amp MIG welder or a 150 amp TIG welder. both of these will be more than hot enough to do the job, and i consider my self pretty good at both. what would be the prefered method to final weld the parts? right now they are just tacked with a 110v MIG. I'm thinking TIG. I never went to school for fab:whiteflag, so i dont know much about metal types or what application to use what, but i can bend and cut and weld. thanks in advance.