Ok, sensitive question. I just bought a Catalina 22 (1971, #880) and it has the toilet up front. How do I use this thing? (not physically, I can figure that out!).No manual with it, so just wondering how I work it. Do I mix up some of the blue water and dump it in? It does seem to be in two parts, there is the top part (seems to have a pump on the left and a covered hole on the right) and the holding tank on the bottom. There is a lever thing on the front that you pull to open up the 'poo hole'.So, how does this thing work? Do I carry the goo out and dump it, get someone at a marina to suck it, does the blue water kill odors and do something good with the...uh...chunks?I've only had the boat out once, but eventually I'll be taking overnight trips, but so far I'm just considering the potty off limits until I know how to operate that thing neatly!Tom