I have no skills whatsoever in this, and I'm a casual simmer when it comes to this genre.
Still, I'd like to contribute what I can.
For what it's worth, I found this website and thought I'd share since this looks like it'll be my preferred subsim when it comes out.
https://www.virtualdockyard.co.uk/index.html
There are some really good drawings you folks could use to make some German ships and British subs.
Regards,
El Cid