Original sentence: Secondary in these ships was almost homogenous as well: Except for South Dakota, configured as a flagship, the other nine ships of this group sported a uniform 20-gun 5" secondary battery (South Dakota deleted two 5" mounts to make room for flag facilities)
Edited sentence: Secondary in these ships was almost homogenous as well: Except for South Dakota, configured as a flagship, the other three ships of this class sported a uniform 20-gun 5" secondary battery (South Dakota deleted two 5" mounts to make room for flag facilities)