well, I have been working......so not very much progress.
But I keep finding pictures that are more detailed which forces me to modify my tower all the time
I have also read a little about the real U-47, and found out that the boat was re-fitted a few times during the war. The most visable modifications ae on the tower ofcourse. I have some pictures of the same sub, with different conning towers. That confused me a little to begin with
The robbe tower is "acurate" as it is of the later U-47. Im building mine as the early version.