Hi Peggie,Best of luck with your Dad.You helped me out a couple of years ago on my old boat and I have your book. Ivan mis-treated my old Hunter 30, and we now have a 1987 Morgan/Catalina 41 Classic. I've decided to install an Electro Scan on the aft head and would appreciate any pointers or recomendations you might have. Removing the old holding tank would be a real pain because of the way it's mounted, so I think i'm going to leave it in place and "Y" valve it into the system in case I go someplace where I can't pump the waste from the Electro Scan overboard. Since the Electro Scan is kind of new, I was wondering what you thought of it and if it was really a big improvement over the Lecta San.Thanks,Steve