I just got an email from Rick. He does sell weed MUFin's; they just aren't on the website yet. Also, he says the correct size for a MUFin for a particular sail size is 2 cm shorter than for a conventional fin. You can determine the correct size for a conventional fin from my Sail/Fin/Board Calculator, then back-calculate from that.** 

I saw something really interesting today on the Windsurf Journal website. 

 

It's a new line of windsurfing fins called "Maui Ultra Fins" or "MUFins". The fins are designed on a fancy computer by a German aerospace engineer named Rick Hanke. Mr. Hanke has thrown out a lot of the common assumptions about how fins should look, i.e that wave-riding fins should be curved in a sicle shape, in favor of sticking with what the math says will work best. The upshot is that all his fins have a similar, simple shape, regardless of whether they are intended for slashing up a wave or for speeding in a straight line.