Heli-arc (TIG), I back feed the root, typically goes in smooth even though I shake like a cat shitting a peach pit. 90% of what I do is subject to NDT, whether it be VT, Dye-Pen, Phase Ray or X Ray. I give every apprentice that works with/for me the same two pieces of advice, treat every weld like your job depends on it, and learn how to weld with your off hand…