Talk:Construction/@comment-36.73.66.240-20131208213851/@comment-24161900-20131209000224

Only BB's you should try to craft are Nagato/Mutsu, and soon-to-be Yamato.

Maybe Ise or Hyuuga, I've only gotten a couple of them apiece. Kongou Sisters and Yamashiro/Fusou aren't even considered "rare" drops.