Moving fresh water tank to the rear

Vintage, I absolutely agree that if someone proposes an unsafe setup, folks with greater expertise have a moral duty to say so. As you stated, it is all in how the message is packaged: a civil but carefully reasoned response is much more persuasive than one that is potentially offensive. The target audience (the OP and all of us lurkers) are much more likely to give credence to a well-phrased analysis of the problem.