I had a chance to drill some exploratory holes. The first, about midway down one side, seemed to show no de-lamination. In the second, on the other side, the skin is completely detached. I then drilled a third hole, about 3/4 of the way down, to determine the size of the de-laminated region, and to my surprise, there seems to be no core! Apparently the core
only extends partway down the daggerboard.
So a few new questions:
1. Is this a normal mode of construction?
2. Should epoxying just the part where there is a core
be enough to restore the shape?
3. If so, what should the spacing of holes be for injecting epoxy