I have to say the waste tanks have been the hardest to work on so far. We have a lot of starts and stops. Some of it had to do with that flooring we are going to put down. Or which sink we were going to put in.

In that later case, we needed to figure out which sink we were going to do so we could finally decided where the drain hole was going to be. That was not easy by any stretch of the imagination. We look at many different options and finally decided on one that was cheap and allowed us to install it the way we wanted to install it. Once we knew that, we were ready to go on the drain pipe hole.

That in turn finally allowed us to screw all the boards down and put sidewalls on the platforms.

Now the fun is installing the flooring. Which will allow is to put the sink in, put the shower pan down, and install the toilet. Not to mention the vent pipes for everything.