Thanks for this suggestion in the toilet post about the water tanks port and starboard. Sounds like you may have gone ahead with it yourself. We can go about 3 days on the one tank and are looking to extend that a bit. I'm going to plumb a salt water pump in the galley to save some fresh water usage there.
I read a good article that showed a bow holding tank removal and then the building of an integral water tank in it's place. It required a lot more work.