Here comes the Spaehkreuzer in its final 1940 design. While no real plans exist, only some loose drawings, it is mostly from imagination, empirical knowledge and simple logics. But the general data and its purpose are recorded:
The size is 7500 to, length 162m, beam 16m, armament are 3x2x15cm tbk, 2x2x8,8cm heavy aa, 4x2x37mm med aa, 8x20mm light aa, 2x5 torp launcher, 1 aircraft (while that one is questionable). The purpose was an oversized destroyer for escorting the large fighting ships on long range missions at atlantic ocean. I started with the drawing from german-navy.de.
First I changed the 8,8cm to 10,5cm what was done to all large ships. And I dropped the aircraft. The Spaehkreuzer would have been comparable to the K-class cruisers by size, but its max speed was to be more than 36 kn. So the machinery must have been bigger even when it was to wear lesser armor. So no aircraft.
The 1940 design went from one to two heavy aa turrets. Where would they have been placed? Surely not at the 1938 designed position behind the two aft main turrets and maybe between bridge and fore turret. I decided the position between the torpedo launchers as wing turrets to be best. The allover firing angle is perfect for them. But I placed the 2cm quads at the positions mentioned before. The 37mm twins are mounted on platforms beside the funnels.
Doing this drawing was a lot of fun because the sources were so few and weak or simply wrong at details. I hope I made the best from it.