Luxfer 6351-T6 aluminum tanks have had some problems.
I didn't know when I got my 3000 PSI tank that it was on
the 'watch' list! But, it had just been tested and
I only payed $50 for it..
I have a steel tank purchased in 1968 that is still good.
It's been a while since it's been in for testing, but
I'm pretty sure it would still pass. But, not worth
the money for only 2350 PSI..
Remember the Alamo!