On the valve on the bottom, doesn't that leave you in a really messy position if you have a hose or clamp failure? I looked at a self contained unit from sealand that is 28 gallon, has eventhing installed, including a pump out pump. first, if I cannot discharge over the side, is there ever a time that the discharge pump would be used? I have never hooked up to a waste station, so I don't know. It looks expensive, but can be bought for about $650, and seems to have everything, including monitor lights, pump, etc. I don't mind spending the extramoney on this to get it right if that is the answer, it is going right under where I sleep, so I would really like it to not be stinky.
Or am I overengineering.