Peter--- Yes, we are aware of those and looked at them awhile back. Here's the deal. I've worked in a high-tech industry long enough (film/video/music production) to have learned decades ago that right about the time you really need a piece of technology to do what it's supposed to do, it won't.
So we rejected the auto-inflate key float on those grounds. A piece of cork or a plastic float has zero operating function. It just IS. As such, unless it's been structurally damaged, it will float every time assuming the weight's not too much for it.
I'm a big fan of technology but preventing our keys from sinking to the bottom of the bay is not a task I want to trust to it. Yes, I know they work great in the demo tanks at the boat and sportsman's shows. But I regard these demos the same way I regard the folly that is sky-diving: why practice something that has to work the first time?
So we rejected the auto-inflate key float on those grounds. A piece of cork or a plastic float has zero operating function. It just IS. As such, unless it's been structurally damaged, it will float every time assuming the weight's not too much for it.
I'm a big fan of technology but preventing our keys from sinking to the bottom of the bay is not a task I want to trust to it. Yes, I know they work great in the demo tanks at the boat and sportsman's shows. But I regard these demos the same way I regard the folly that is sky-diving: why practice something that has to work the first time?