Matt Barrow wrote:

a good but low-buck oxygen system.

Oxygen system oxymoron. (Had to throw that in)

Well, not necessarily. (I assume the above is what you're referring
to.) I'll have a better system for less than 1/3 the cost of the least
expensive aviation oxygen systems I've seen. Including adapters to
refill from any medical or welding oxygen cylinder, I'll still be at
around half the cost.

-Dan