Hi Peggy, great book. I have a question I could not find an answer for in it though. I have removed the holding tank and physically seems to be in good condition. I will rebuild the potty and replace all hoses with Odorsafe. What is the best way to clean the tank and get rid of any odors now that it is out of the boat? It is a plastic tank that I think was made by Ronco. I will also add a Beckson cleanout/inspection port.ThanksTim R.