I would love to give this 3D printed model a shot, but the files aren't available, and I'm too cheap to buy for $25 when I have a printer.
Tbh, I'll probable just get the 17" long nato strap and call it a day. I would have to change the straps out for warm / cold water diving, but they're pretty simple. The longer strap would let me put it on the drysuit before my dry gloves which wouldn't be so bad, heck I could almost leave it on the suit, it couldn't fall past the ring anyway, and the battery lasts forever.
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If I only dove warm or cold, I would probably do something bungee...