On Sunday, June 9, 2019 at 8:34:57 PM UTC-5, Jonathan St. Cloud wrote:
Three years ago I did get a brand new steel D from Eastern. The composite cylinder is too small for western flying.

luxfer 'd' composite, 15 year life, under $300, available, 15.4 cubic ft.
1.2 cubic ft smaller than a steel 'd',
so it is about 7% smaller,
weighs 5 lbs full
and it will physically fit. These numbers are for the luxfer M15A5.

I'm sure there are even smaller composite cylinders out there. but why?

On Sunday, June 9, 2019 at 8:34:57 PM UTC-5, Jonathan St. Cloud wrote:
Three years ago I did get a brand new steel D from Eastern. The composite cylinder is too small for western flying.