Just a note from our earlier work on the XXIII, where we converted your original SH3 model into a human-playable version... The "training stripe" should be yellow, not white. This is a product of black-and-white photographs being misinterpreted.
According to a contemporary source on U-2329 "Das Boot trägt die
gelben Erkennungsstreifen am Turm ..." We followed this up and could only find mention of yellow stripes, never white. I don't have any
colour photographs of a Typ-XXIII, but I do have some of other U-boat types, if you want me to dig them out.
Anyway, it should look something like this...
... however, that said, your new model's quality is muuuuuuuuuuuuuuch better!!!
Stunning work, Flakmonkey!