I just finished this one. The fin was made of balsa and wenge strips (balsa for lightness, wenge strips for strength) and a tinted glass bead was added to it before glassing on; here are a few photos:
Yup. I like that profile rig you have. I would have ‘cheated’ and routed the fin into the stringer. Many of the Sixties board makers advertised routed fins as a feature.
I also like your approach of using balsa for lightness and another species to add strength. Nice work!
Thanks to you all. And special thanks go to Mitch Chechik for the bending rasp tool that he sent me some time ago. He told me that he used it for concaves but I never actually used it for that. But it came very handy for this kind of job.
Now, it’s far from being perfect. If you look closely, there are a few bubbles in the glass bead around the fin, and a few more (less) at the base, too. I hate glass-ons, actually…