i have met and trained with several people who train "shaolin do" who have built a decent understanding of lets use tai chi chuan for an example but these people are not doing what sin the or bill leonard teach. i appreciate many things about my experience in atlanta learning the internal side of the system but i did have to reach outside of the system to expand my understanding.
one of the things that attracted me to the classes at the csc atlanta is it was the only school in atlanta at the time that i found people sparring and practicing tai chi chuan applications.
to this day i do think gary grooms taught me good tai chi chuan and am glad to have had him as a teacher. i just wish i did not have to endure all of the stories, mysteries, misinformation and lies involved with the system.