I would rather invest in a good plan and equipment to plug a leak or at
least slow the flooding.. Collision matt and DC plugs. Hinged Plywood
patches with "J" bolts, etc.

Back to the inflation system..

Sea Story to follow:
I knew of a fellow whose boat sank in shallow water at the Coronado Is.
(so.of San Diego). It was a small wooden cabin cruiser.. Some friends came
to his assistance and they put a life raft inside the cabin and pulled that
infation lanyard.. Ripped the deck and cabin off the hull.. Seems a boats
deck attachments weren't strong enough to support the weight of the hull and
it's engine, etc. Or it could have been that the volume of the hull interior
was smaller than the the volume of the inflated life raft.

Steve
s/v Good Intentions