Thanks Ian for the response, and I really do appreciate your honesty about it. I never thought about sailing backward to clear the fin, but of course the fin position is much more centered on the Serenity than on standard boards. My first board over 20 years ago had a daggerboard, but frankly I rarely used it, so I can't really remember whether the daggerboard tended to gather weeds. If you do have the opportunity to try a weedfin on the Serenity, I would very much like to read your findings. Again, thanks for tackling my question.