Thanks Bruce.
There are people here who call what they practice Paingainoon Kung Fu and Paingainoon-ryu Karate. But like I said, all of what they've learned is Uechi-ryu and while certain people have tried to "reclaim" the origins of the system by training differently, etc. I don't see any real basis for this to occur as there aren't any real connections with Shushiwa's other students and their descendants (if they still exist) in China.
There were originally only three kata and they are the backbone of the system. Uechi Kanei invented five more, bringing the total to eight, for the purpose of retaining students and introducing the concepts more gradually.
Mattson sensei practices all eight kata and all eight kata are accepted by all of the Uechi-ryu organizations.
Regards,
Jeffrey Luz-Alterman