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I have the Focus 9 one and it's been fine since I put it in last year (I have the non-prime one I think).
I also have one of the (new version) Uro ones which I used for a couple months. I thought it had failed, which is why I got the Focus 9 one. But in the end it turned out to be a bad reference sensor. I put the Uro one back in to check and it works fine as well.
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