Returned to the IJN and have more bug reports:
-Kaichu boat has a significant visible gap between the tower and the hull when seen from the side
-Kaidai Type 4 is missing the heavy AA that one can equip and put crew members in, in the game it's not there
-Kaidai Type 4 periscope depth is wrong, the sub does not reach the surface
-Kaidai Type 3a misses the tower when starting a campaign in 43, has no watch crew and no AA or DG. And the torpedo loadout is incomplete in the harbour
-Several subs have a very low 1/3 speed, the steps are 2knots, 6knots and suddenly 12 knots, better would be 4,8,12 or something more linear
I think will now wait for an update and/or new version before i return to the IJN
