Last October at the Asia Pacific NMR conference in Brisbane Ad Bax gave two talks on the use and misuse of residual dipolar couplings for structural determination. These lectures were recorded and have been put on-line via the ANZMAG YouTube channel. https://www.youtube.com/watch?v=cjXgUPsJjgQ https://www.youtube.com/watch?v=bmx56Fjv8Hc Starting at the top end but it is worth it.