The seatback packs arent hard to use, but your back passengers may not like
them cutting into their legroom. I dont know about all the systems, but my
Aerox has it's flow needle about halfway up the line so you can see it
pretty easy. But to actually turn up or down the amount going to an
individual line you have to be able to reach the 4place regulator. And to
see how much you have remaining in the tank you have to see the tank.
The alternative, unless you rent, is to retrofit it into your airplane.
Aerox makes kits to do this, I'm sure the other companies do too. The tank
is in the tailcone more than likely, and a block is put in the ceiling with
4 ports and gauge. Pretty slick, but not cheap. $1,500 for the hardware,
and a few hours of labor. This is for a fairly large tank, not the size of
the portables. Fill it from the tank, or a port in the tail.
Chris

"dutch" wrote in message
link.net...
I have a new IFR rating and am considering some higher altitude flights
now
that I can drop down through cloud decks. Question: for those of you who
carry oxygen, how do you secure the tank so that you can still reach and
see
to adjust the flow valve? Vendors sell seatback packs, but those sound
difficult to use.