Board Thread:Game Updates/@comment-1820055-20150701022818/@comment-25284995-20150803041911

The only acceptable and reasonable guessing is Reppu (whatever normal, 601 or Kai version) might be one of Shinano's (or Shinano Kai's) stock equipments.

I think the crane sister Kai Ni's stock equipments are related to any more advanced planes but it's hard to believe these planes must be Reppus (only except what-if or unhistorical remodelling, there might be a chance).