I made some less good looking Wooden Weed fins That I designed myself and worked suprisingly well.
The first 2 fins I just Varnished but those fins werent stiff enough and twisted and flexed allover the place.
As soon as I started to glass them and even more when I addded carbon at the base eveything became a lot stiffer and working better.An carbon base doesnt look as cool as the full wood fin, but I can really recc that.
I have only a pic of my very first fin, but the later ones had a lot less surface but worked pretty well and above all building them is good fun. :)