Hi I'm new here. Trying to get to "Sunseeker" but cant find how. I have 2000 SS56 Predator. Love it but 600ltr water is never enough. I want to add a water bladder of up to 250 ltr if possible. I have plans showing current water tank and black tank, but no plan on diesel tank. It looks under the rear berth. Anyone confirm, and more importantly anyone added a bladder? A water maker is another problem I don't need.