Hi, following the subject of the Japanese special torpedoes, especially the Anti-sub circling torpedoes Kurai 6 and 7.the opinions are not fixed, in fact they diverge.the famous American reports mission to japan 45-46 present Completely different drawings .In truth we have three configurations with two kurai 7, "such as they were described " in Ishiguro and Januszewski book's another important point which remains unexplained for me in the US reports torpedoes appear without horizontal fins,but in the book the horizontal fins appear .An opinion please