Hi OldNoob.
You `ll manage, even if 99 % of the people admiring you finished model would not notice, you, having the knowledge, shall have the satisfaction of a correct boat. While being on the subject of green putty, if you have a closer look at my photo you shall see the starboard upper bow floodgates are not 3 as on your model, but 2. On the port side you have 3. These funny details are on all VIICs except present days U-995 which for some reason has wrongly 3 floodgates on each side.
Tore