That's great news that the Serenity appears to work very well with weedfins. Frankly, that tends to clear up a major obstacle in my mind regarding the board's performance. Also, the fact that the board performs well in very light winds using a relatively small sail is unexpected and very encouraging. I would be quite interested in how your testing goes with larger and smaller weedfins. If I recollect correctly, you have some of Lessacher's weedfins. I have two Duo Weed fins (28 and 34cm). While the 28 is most likely too small, I wonder about the viability of the 34. Any feedback on your future testing would be greatly appreciated.