I agree that with tutorials and stuff , you can learn how to do stuff. It was nice at times after doing something Id never done before, to at least havea mechanic quickly check to see if it appeared to be done right, or adjusted right. I usually had my wheels checked over for spoke tension, and so sometimes would ask fora check of this or that at the same time.
but yeah, if youve done other bb's, the adjusting concepts pretty much transfer from headsets to bbs, to whatever.