Hsie,if I may I will also gladly test your new sink mod.As someone mentioned,if its possible to make it so that the mass of the boat rises faster the deeper you are then thats superb stuff!!!Now the silent running fix does this by just lowering the set depth slowly and it works well IMO.If it accomplished the same thing then is it worth it??If you can change it so it gets worse with depth then again superb stuff.
Whats kool is it seems to model the 10 pound ballast compressor.If you blow ballast or just surface normally the sub seems to not be fully filled with air for awhile.You can blow ballast again and it now rises fully out of the water right away.
""The 10-pound MBT blowing system is used to remove water from the main ballast tanks when the boat is on the surface. It completes the work started by the 600-pound MBT blowing system, thus saving high-pressure air.""
It is turned on when the hatch is opened and just sucks in air and forces into main tank^^^saving the valuable compressed stuff.