This article in another forum concerning a keel failure on a pretty new boat is interesting if still non-conclusive. Don't think I'm stepping on any copyright issues here:
http://wavetrain.net/news-a-views/7...ilure-what-really-happened-to-polina-star-iii
http://wavetrain.net/news-a-views/7...ilure-what-really-happened-to-polina-star-iii