yeah, 170m are about 558 feet, it seems a little bit to much for those subs. IIRC I went to 530 or 540 feet with the Tench class in SH1, and it had the same crush depth as the Balao. But the other subs...
It must be some reason for scaling the depth gauge only to 450 ft, isn't it? (450ft x 0,3048m=137,16 m)
Don't get me wrong, I really appreciate your work regarding mods, but this one reminds me of some hollywood war movies, simply to naive to be true
greets