Can anyone advise me how to glass on fins properly so they don't get weak and give way at the base after time? When I was younger I used to build and ride my own boards but always put in fin boxes. I recently began shaping and glassing my own boards again and have thoroughly enjoyed doing all the work myself. It has given me great satisfaction to ride a board I created and built from start to finish. I am also building my own fiberglass fins from scratch and mounting them...they are working really well, but the bases are giving way over time. Recently on a new board on the first take out, I lost a keel fin on a hard bottom turn...what's the secret...is it in how you wrap the glass rope? They all look really good when I'm done with the sanding and glossing, but I must be doing something wrong when I'm mounting them.