Concerning the sewers OoB: I just noticed that it might me a bit faster and safer to use this valve-thingy to boost onto the pipes and the connection between the two pipe-parts to go OoB instead of using the chair and/or the piece connecting the pipe to the wall.
![](http://puu.sh/4rwKb.jpg)
![](http://puu.sh/4rwKb.jpg)