Homemade wooden fins

I put some videos on u-tube, for anyone who likes to make his own fins... https://www.youtube.com/edit?o=U&video_id=UrEjt3z16c8 How to make Your own replaceable wood core fins https://www.youtube.com/edit?o=U&video_id=bWDPbvOvscc How to make surfboardfins with canting https://www.youtube.com/edit?o=U&video_id=-PP1nXIZ4KE How to make fins with bend https://www.youtube.com/edit?o=U&video_id=JN-4zkXMjZY wood paper core fins https://www.youtube.com/edit?o=U&video_id=Icc3AqZGjkA How to make surfboard fins. Measurements and dimensions of fin systems