On Feb 14, 1:49*am, Ron Clark wrote:
I am considering the Aerox DDO2 mechanical diluter demand system. *I
only occasionally use supplemental O2, *mainly for the a few trips
each season to fly on the east side of the Cascade mountains in
Washington state. *I am currently using a Aerox regulator with a
needle valve, *and an Oxymiser cannula. *Since there are no filling
facilities where I fly I am hoping to get a little more mileage out of
my tank. *Could somebody out there provide some feedback on the DDO2
regulator? *Is it a good option for the occasional O2 user? *Does it
provide a significant reduction in the amount of oxygen required? *Is
it easy to use? *I don't care for the " string around the neck"
option. *Has anybody mounted it to the interior of their cockpit? *Any
other information would be appreciated.

Ron Clark

I bought a 60 cu ft steel bottle and use it to fill my 22 cu ft
aluminum bottle when I'm on the road. I use a needle valve and
oxymiser cannula as well. I have all the O2 I need, cheaply.

If I had to do it again, I'm buy Mountain High as Tim suggests.