<DIV style="font-family:Arial, sans-serif; font-size:10pt;"><DIV> I'm thinking that it may be easier for me to have a variable tank inside after all, if I make it out of a rubber material I could make a big bladder bag . That way all I would have to do is have one line going to it with a reversible bilge pump on it to vary my weight.</DIV><DIV> </DIV><DIV>Brian</DIV></DIV>