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Duh. What I've been saying all along. Smallest bottle with the most breathable gas on a transfill from an al-80. Do you get it now? Or are you still missing the point?
the steel lp19 is the exact same cylinder dimensions as the hp23 which is also known as a 3L
the steel lp13 is the exact same cylinder dimensions as the hp15 which is also known as a 2L
the 2015psi aluminum 14 hasn't been made in over 10 years and highly coveted
the 3000psi al19 is the exact same dimensions as the al14 but will hold every so slightly less gas because the walls are thicker. Technically just under 3L water capacity.
"the smallest bottle" is the 2L 13/15cf, you can fill it to ~2900 and have about 14cf of gas.
"most breathable gas" is either the al14 you can more easily get 14cf because the working pressure is 2015psi
or its the lp19/hp23 filled to 3000psi which is about 21cf
I've got a lp14 (2015psi). Its about the same physical size as an al19. It was a gift. If I was looking to buy another I'd just buy an al19. The al19 holds a little more gas at the same fill pressures and can safely filled to more than the 14.
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