I am totally lost with you here. None of those were stainless pics. The only thing undercut is the first triangle pic from the root pass. What pic are you talking about?
Your first post was they lay a bead with filler then swoop over it with pulse to make the weave look. The camburg stuff is root with filler and weave with more filler, steady or manually varied current. And the aluminum intake I am very sure is not a make it pretty swipe over a root pass, thus my point to posting it and being very impressed. Since all that fancy foot and hands work is insainly steady and consistantly perfect.