On to more random stuff. From scouring the web for internal plans for the vessels I'm trying to recreate... I stumbled upon the plans of the project 50 Tauchshiff on a site called dreadnaughtproject.
It was an evolution of the U-cruiser concept with an internal turntable pair of torpedo tubes in addition to a regular set of eight tubes. On the deck sits a pair of funnels with fairings and four 15cm deck guns. From the cross section frame shots it also appears that it may have had some belt armor.
I suggest opening the image in a seperate tab since it's quite massive...
