Guess no one wanted to address this issue. The leak, as you note, can be from most anywhere, but the resut it the same -- water collecting under the berth. Maika'i had lots of leaks and collected lots of water, so I just drilled a hole at the lowest point along the outer bulkhead of the bunk. At a steep upward angle since the hull is sloping upward The fix worked and the water just drained onto the sole (with all the other water) and into the bilge. Since all the leaks were repaired (mostly to do with the hull to deck joint) water no longer enters the underbunk area, but I do clean the holes regularly, just in cast.