Canister gas exchange

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One particular thing i'd like to see go from Destiny to Cogmap 2 is the Canister Tanks in atmos. Just the oxygen/air one, so it's easier to make a place habitable.
<---- These

Perhaps this is what OP's could be getting at?

I should probably not make this post before checking what the other tanks around cogmap2 contain, but still, having these two tanks located somewhere in engineering would be particularly handy.

Huh, Cogmap had these? I remember one on the NASSA derelict but the one time I used it the tank only filled to about 1200 iirc. Enough to fill an air tank, which was what mattered really.

Over the last few months of Cogmap's existence, the regular air canisters by the air hookups were replaced by fixed tanks.