As it was not windy today i played around in workshop. I have wanted to start reboxing fins as you cant buy decent quick weed fins.

I knocked this unit up. I have the stuff to make the mould.

The arm that holds the leading edge is on a hinge so i can change the angle as i wish. The ali track that hold the fin is the mast track out a my long gone course racing borad from years ago(Windrush XP). The fins(well all of mine do) wedge in nice and tight so minimal clamping is required.

can anyone see and improvements i could make before i pour in the goo to make the rubberised mould(yes Sam i have ripped off your design).