I have been diving one of these for about a year and I can't imagine not having it now.
I think every Meg diver should have one. It's easy, quick, and almost impossible to screw up the calibration.
I just wish John Routley would build them (with Ken's permission of course) so you could buy them on RebreatherWorldStore. I have to keep my eye on mine at all times with Meg divers around.
Bruce
