It's already frayed the cover so I think I should definitely dull it down.(since they are 20 years old, it seems like it has just been beaten flat and the edges of the gel/fiberglass are a bit sharp) Didn't even think about crew safety, good idea.
Thanks.
You don't need to dull it - you just need a longer PVC tube in the center of the foam to spread the bunji out past the back of the board.
