Originally Posted by manyboats
I think the BL chine mod had little to do w the chine and mostly to do w increased flotation aft and making the bottom larger aft with increased flat surface.
As I recall from the magazine articles about it, the add-on chine is not very large in terms of width. All it does is square off the round corner of the original chine. I don't recall it sticking out any beyond the side of the hull. So while it adds some underbody area, it did not appear to be a lot. Just enough to pick up the stern a little at speed.