There really weren't any challenges, as I had done my building plumbing model prior to this one. With the main branch system already given, it made it simple to navigate the individual pipes to each plumbing fixture. However, where some nuances and frustrations came into play was applying the floor 0 system into the other floors. I struggled at first because I recognized not everything was in the same position and had to move around and adapt there. However, I simplified the model and deleted and manually created the components that weren't working in order to get my final system complete.