Ok, so I found quite a few of faults in the sub, and took the liberty to correct them. I found :
-Faulty pumps
-Hulls that didnt hug floors and left a lot of stagnant water
-lack of vent in cargo, can be a bit dangerous for bots
-supply cabinet in the foreground, a bit jarring
-unwired diving lockers
-drainage problem in cargo, managed to adjust the pump and sensor so that only 1% water remains.
-as personal preference : railgun firing button in nav terminal, two more dive lockers, one more ammo shelf.