The prepartion required for a perfect finish sometimes extends to the structure itself. Such as in this 100 + year old home in #kensingtonmarket.
For a perfectly square and level washroom we replaced all the floor joists, 1 exterior wall, roof and strapped all other walls. #symmetry to this washroom was also achieved with every detail in mind. Look at how the floor tile grout line is centered with the bathtub as well as the two sinks on either side.