I thought I'd post here quickly to say that CB Subs does indeed see and recognize the extra ACL groups created by NoixACL. I haven't really tested yet to see if it works fully (e.g. if a subscriber automatically gets put into that group, and gets its privileges and limits), but seeing the content/menu/extension access control of CB Subs, I do think that my aforementioned "Upgraded Members" ACL group is hardly needed for much of anything at all.