Time to do mine.
- First flood was in the rinse tank back in 2005 or 2006. Front port was knocked askew resulting in total flood.
- Second flood was about 6 months ago in Fiji. Still don't really know what happened, just saw bubbles coming from the top left of the housing where the surfaces mate. I was about 20 feet down and by the time I surfaced the entire housing was full. Opened it immediately, but didn't find anything obstructing the o-ring. I'm very careful with my gear, but I did just change from wide angle to macro, so obviously I did something wrong. BTW, the moisture alarm *did* go off, but the housing was already half full of water, so it really just added insult to injury. My flood insurance worked better than the moisture alarm thankfully
At any rate, the one thing I am certain of is a vacuum system would most likely have prevented both floods. My new Backscatter vacuum system arrives this Friday.