I just got one of those canisters off ebay from Australia. Have not tested it yet. But FYI, it comes with a disclaimer that states the canister "will leak" if you don't keep the o ring very well lubricated. I was a bid dismayed that fact wasn't mentioned up front on ebay. The practice of applying a small amount of lubricant on an o ring normally should protect the o ring, not help enable a viable seal. Also I have read discussions where other customers have had trouble with leaks. My other concern is the fact that solid and streamlined mounting options are a bit limited given it's design. But for the price, IF it keeps water out, it is a good option for that PLB.