My mast must be dry and water tight because if both of you who are bigger than i am can't get the thing upright and I can somthing isn't right.

I know mine is airtight because once when I turned over I decided to chill for a while and sit there and drink a beer on the lower hull.

Once you go cat you never go back! Nacra 5.2 (Elsies)#1499, running an inter17 spin!