The diameter of the water column doesn't have any affect on the amount of pressure required (since, as the diameter of the tube increases, the amount of surface presented to the applied pressure also increases equaly).
*boggle* I believe you Jake, but I have to let that mature a bit. It is easier to accept if the mass of water stay constant, while diameter of the column varies?
Our Marstrøm Tornado hulls are pretty airtight (even with the venting holes in the inspection port lids), but we still get half a cup of water in them from time to time. I suspect that the water comes from condensation.. Same might happen with Steve C's hulls.
