Curiosity:
Michtavim Umaamarim vol. 3, #213.
“Everyone must follow the traditions of their parents. One may not deviate from their customs. And in a case where there is a disagreement in Halacha and there is no family tradition, one should follow the Posek who is a greater Godol BaTorah. And it is possible to know who is greater, for example, here in Eretz Yisroel there are many places where people should follow the Psakim of the Chazon Ish.”