I just took the TIG steel framebuilding class at UBI last month. I learned everything that I need to know to build frames using TIG. I'm not saying I can build perfect frames, but now I have a good understanding of how they are built. And what you need to build them. And where to get all that stuff. I thought the class was well worth my money ($2150). Plus you can stay at the CycleHostel right next door. And you leave with a frame.