Video: Centering a 4-jaw chuck

This is probably the best video I’ve ever seen showing how to center a piece of round stock in a 4-jaw lathe chuck.  I am wondering about one thing though.  Some of the commenters on YouTube refer to centering the chuck the “normal” way.  Well, what is the “normal” way?  This is pretty much the way I do it, although I still haven’t gotten around to making a second chuck key yet.

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