I have read all but one of the above mentioned videos and while I have found them to very informative, I would recommend that if given an opportunity to attend a class by Kent for metal welding of all types, that you jump on it with both feet. I have recently had an opportunity to attend a four day welding class here in Rock Hill by Kent, and can tell you that his welding/soldering/brazing instruction is much easier to comprehend as he is extremely knowledgeable about metallurgy and he can explain not only how something works, but why. (1200 degrees Will...
) Acquiring those videos in advance of attending one of his classes would seem to be a prudent move.