The master bath is, happily, done. It was a process to figure out, on the fly, how to build a walk in shower. Minus the internet and it would have been constructed with black plastic, unrolled and duct taped to the studs. Add the miracles of the millennium and a little mind meld between me and some people who actually know what they are doing and shazaam, a shower. Not perfect, not horrible, without significant blood loss or requiring large quantities of alcohol to recover from (though I am thinking about those bottles upstairs above the quarter bath). Floor heat is in, but not on yet (waiting. 28 days after installation. No idea why besides the mortar bag said to). The toilet flushes and presumably, appropriately, sends it's contents to the septic system. I haven't actually verified that empirically. My conclusion is more by inference and, like the light bulb in the refrigerator and our acceptance that it does turn off when the door is closed, taken a little bit on faith. I flush, nothing horrible runs out on the floor, things must be good.