Oh, so ill skip those holes then, either ways, there is very little room to maneuver around there.
CMK probably made those holes to make the cut outs more attractive, since obviously making compensating tanks would prove difficult (so as did the freshwater tanks in my section)
I just had a conversation with our rapid prototyping expert, he fast reviewed some of parts and said that most of it would be no issue, here and there result cannot be guaranteed - especially those reliefs in the freshwater tanks, however we will try to print out all of the parts. If the printouts will prove to be at least good, i will move on to the rear torpedo section.
Also IF the prints wont be faulty, i might consider designing the complete 1/72 type II interior, for the SN kit, or the 1/72 Type XXIII.