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FWIW- I dont turn on K! points- nor did Ip Man.Wong Shon Leung, Ho Kam Ming, Fong chi wing.
Some of Ip Man's students did turn on "the center of the foot" (which sounds like what KPM means when he uses the term "K-1"), and worked very hard to perfect that method. Did they get that method from Grandmaster Ip? I don't know. At any rate, that method does exist in the Ip Man lineage.