Attach a string through the hole in the fin to make a tether. On the board I keep in my car, I put a piece of sandpaper on the surface for more grip. The gcodes I provided are some simple ones that I have printed before.
A-Solid color throughout
B-Filament change to make stripe
C-Filament change at fin
D-Filament change for stripe and for fin
The author hasn't provided the model origin yet.