Hey Jim, sounds like a good story here...
...why two? I've considered a single larger tank but settled on the two 5 gal jugs for several reasons; low maintenance (little work for a lazy guy like me), cheap to replace and simple. Same reason why I stuck to a porta-pottie type unit when "upgrading" tankage to 5.2 gal from 2.5. It's plumbed in but still easy and cheap to replace if broken and can dump it shore-side if no pump-outs. If I ever have enough $$$ to have something larger (I have 10 ft itis), then I may get into more complicated systems. Maybe just a fear of things that can break, don't know. Then again have briefly thought of a/c, shore power, pressurized water and even water heaters, now just dreaming. Your suggestion for foward tanks like the 260 has is definately better for some. alan