Gday, attached are photos of a fin i have in my old Tyronsea. It looks like an A box but then the little fin-shaped clip at the front has got me confused. i can't seem to remove it and i don't want to snap it just in case it is a required piece of hardware. Despite an exhaustive search on youtube and seabreeze i cannot find any info to tell me what this clip is called, and how to change it out.

i'm pretty sure that if i can get it out, i can bring the A-Box fin forward and screw it in using that front screw. at the moment the screw is not holding anything down, its just filling the hole.

I used the Tyronsea to learn to sail, and still use it for friends etc... but my latest escapades have involved Stand Up Paddling SUP with the Tyronsea and it is ideal. New adjustable Starboard SUP paddle was $150. Much cheaper than forking out over $1000 for a second hand SUP board.

Any advice on the fin is greatly appreciated.