Hello, recent I also brought the seawolf and would like to use your method to make it static dive. But, I have a queston, when keep pumping the water inside, how did you know the water bag is fill full of water?? Because you don't know the bag is full as the hull is sealed you can't see it. If keep pumping the water inside, the bag may explose if full. So, is it necessary to add an auto-cutoff switch which to stop the water pump motor when the bag is full of water or anyother method to avoid this problem???

Regards, Andrew