@Barmaglot, I can confirm you fear is valid : I've broke my Ikelite housing during transport in its bag in the trunk of my car, and I suspect it has been done due to the Vivid Leak Sentinel protruding too much, and allowing something (cable, arm, …) to push on it, and break the housing. Attached is the picture of the housing with the crack on it…
Hopefully it happened before diving, and the "pressure check" allowed me to detect it… I cried a lot, and left it in my car…
I didn't even tried a repair, I had the opportunity to buy a new "2nd hand" housing, like brand-new.
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And now, when I pack my gear "ready to dive" (with arms and etc…) in my car for example, I remove the Sentinel, and only put it when arrived, at the hotel or at the shore.
But otherwise, I'm really satisfied by the Leak Sentinel (I own the V5, the long one).