Earl Weiss
Senior Master
Right, I believe that the Kuk Mu hyung are GM Son's creation and not something that was taught by GM Lee, Won-kuk. GM Son's group is the only splinter group of the CDK that did not keep with KKW forms, that I am aware of.
Well, as you know it seems the CDK is now more of a fraternal group. I know of people who are progeny of Han Cha Kyo and Nam Tae H both CDK people and ITF Pioneersi that do the Chang Hon system and consider themselves CDK. I do not know it\f they all get the Kwan system / Kwan fratermal group dichotomy, but I have seen some of these progeny with CDK certs obtained thru GM Nam.