I second "Pepin's" approach/fix to the crack in your daggerboard well. You may need to remover the complete hullport ... ring and all so that you can reach your arm in far enough. But while "Pepin's" suggestion will take a little work up front (removing the hullport) it will be a much "cleaner" fix ... trying to sand out epoxy drips/runs in a daggerboard well can be .... tedious. (I have that merit badge already)

Harry Murphey