...the reason I've been hitting the books for such info is?...if you need
a large [close to 800 square-feet], lightweight [no more than 2,600 Ibs empty], pressurized gas storage-tank
capable of containing pressurized-gas at 10,000 PSI, then...
you don't have too many options available.

I'll admit...I came close to defeat on
this one.
But if you could have seen me grin from ear-to-ear in triumph when I found a combination of a Kevlar-Epoxy composite [density: 1.25; Tensile strength 206,000 PSI] and
a new lightweight/superstrong [woven] material that has a density of 0.967 gm/cm^3 and a tensile strength of 471,000 PSI... Then!...HALLELUAH!!!
I have the material combination
for a [max] 2,600Ib, 800sq.ft surface,
10,000PSI pressurized-gas storage tank.

Yes! Yes! Yes! WOOOHOOO!!!....

Oh! By the way, John Cormack...If
you're reading this...I've taken that compressed-gas specific-impulse of 70-seconds [that you gave me] and BOOSTED the figure to [FIRST] around 150 seconds.
That was easy...You and I know how.
[ANSWER: Delta(T) = Delta(2000F)].

Then...[using another phenomena of
aerospace science; recently discovered]
I boosted that specific-impulse value even HIGHER...to around 300-seconds.
I'll give you a clue, John:
Too bad NASA didn't take a risk and try the concept on a shuttle-engine [even a static test]; Where they afraid to ruin one? That's the clue.

I'm one happy camper!

Jacob