Surf Board 1:8 scale

I am making a garage diorama 1:8 scale and needed a surfboard to add with the car.
This is taken from "Spec Ops: The Line" as an OBJ file and converted and rescale to have a 7' board 1:8 scale.
The board'd size is 28.8 cm so I put 2 files. 1 uncut board and 1 cut in 2 parts.
I don't know if I need supports for the fins (I am printing it at the same time I publish this).

If you have some objects or characters I can include in my garage, I will be proud to find them a place.