I was just thinking about learning to build frames (now that I live nowhere near UBI). I am more likely to borrow a torch and have someone show me how to fillet braze tubes than I am to pay $3000 and fly to Tucson, but it’s attractive.
Dave Bohm says you learn more by building a lugged or partially lugged frame, since there are more fundamental aspects to it than TIG or fillet brazing. He also said TIG takes the most practice, which I didn’t know.
Bohemian framebuilding school T-shirt – www.framebuildingschool.com