Board Thread:Boruto Discussions/@comment-33255203-20171004210031/@comment-6769189-20171027233533

@chris: the process has been explained multiple times and transplant wasnt part of any explination. But if you want to miacontextualize circumstances go ahead

But since you believe that the process is Transplant+ Special chakra + Special eye then that means you Hamura and Hagoromo got transplants as well. Which they werent stated to but since everyone else had a transplant regardless of their circumstances that makes it a pre-req so Hag&Hamura had to have had one.