Sea Tiger please take all the time you need to complete the interesting WWI Sub mod addon for SH3, keep in mind your never alone in the dark as their are many great mod makers are here to help you grow your dream goal.
You may know the GWX mod makers took all the time they need to complete the GWX v2.1 when this came out, so why rush in a week until you are happy with your mod and yourself very important is never get yourself stress out.
Just enjoy yourself creating a work of art until it completed just like Tomi when he modding the current u-boat, enjoy yourself and never rush.
Kind in mind all the great mod makers can help you do mod testing before this become a final release.
This WWI mod doesn't bother me if this takes 3 to 6 months to complete, I am 100% sure everybody will agree with me all the way just have fun and enjoy.