Hi Jon,
Unfortunately, I learn the term and the pattern from vedios such as "Win with Basic" or " simply the best" and your website . I tried to find good text book from my friends and niece, but failed. I had discuss with my teacher , he seems to dislike discussing. My role is to hear and to follow ! He said: "maybe after 4-5 years , you might discuss with me about the dance , but not now!!"( He still a good teache generally.)
If you have time, would you please detail the quick oper reverse and chasse finish ? ( I knew open natural .)