This exercise was pretty straightforward, but this was probably mostly due to the fact that the bathrooms were directly above each other, so it made copying elements very simple. The connections were also simple because the fixtures were not back-to-back, so the auto-connect feature worked well for all of my connections. I had some trouble copying the pipes across to the North bathroom, but eventually was able to mirror the main pipes and then re-do the branching (which did not take very long).
In my model, I also have my restrooms directly above each other, so that should also simplify my design. I need to revise my architectural plans in my design to include a small mechanical space for each restroom.