I'm positive my hull has not been altered at all.Mine measures exactly 13inches with a 3/4 relief on each side of the pod. I have talked to Eliminator about this and they said it is the exact same hull. The only difference being some outboards they built had a raised center pod. They also said the floor thickness where the pump mounts might be thinner on some outboard hulls. They said they like it a 1/2 inch thick on jets. Mines a outboard hull and it happens to be a 1/2 inch. Guess I got lucky!!!There's also the thicker transom. But that has nothing to do with the hull itself.