Modpack version
1.74 (same issue present on 1.72b)

Issue
ExtraCells 2 Gas storage cells not having proper capacity - for example 4K Storage Cell has a capacity of 32 buckets of gas (afaik they should have the same properties as fluid cells, that is 4k cell ~1k buckets of capacity) - https://imgur.com/a/L1HHQG6.
I cant make any adjustments in config with this matter and im not competent enough to figure out anything more then that

Thank you for the report, I will investigate the issue.