Hello Sober, i must say that i'm proud to see my mod in your famous modlist
but i think it's better solution to use
Submarine's .sim&.cfg (modified for engine ratio + independent control patches) from Volodya. There are all ready included my two fixes for VIIb (speed drop and reverted engine control fix) together with some other tweaks.
Or maybe you prefer my new revision of Volodoya's
Submarine's .sim&.cfg (modified for engine ratio + independent control patches) with further adjusted sub's speeds and draugh ?