diff --git a/vars/default_vars.yml b/vars/default_vars.yml
index 476f93361..7b626095e 100644
--- a/vars/default_vars.yml
+++ b/vars/default_vars.yml
@@ -50,13 +50,17 @@ language_priority: en es fr
 # Real-time clock: set RTC chip family here.  Future auto-detection plausible?
 # rtc_id: ds3231
 
-# Set iiab_admin_user_install: False if you don't want iiab_admin_user & wheel
-# group auto-created in roles/iiab-admin/tasks/main.yml (hence disabling sudo-
-# checks/warnings of published passwds like pi/raspberry & iiab-admin/g0adm1n).
+# Please read more about the 'iiab-admin' Linux user and group, which allow
+# you to log in to IIAB's Admin Console (http://box.lan/admin):
+# https://github.com/iiab/iiab/tree/master/roles/iiab-admin
+# https://github.com/iiab/iiab-admin-console/blob/master/Authentication.md
+# Set iiab_admin_user_install: False if you don't want iiab_admin_user auto-
+# created e.g. by IIAB's 1-line installer and roles/iiab-admin/tasks/main.yml
 iiab_admin_user_install: True
-# If iiab_admin_user_install: False, set iiab_admin_user (below) to an existing
-# Linux user that has sudo access, for login to Admin Console http://box/admin
+# If iiab_admin_user_install: False, set iiab_admin_user to an existing Linux
+# user that's a member of group sudo (or group below?) for Admin Console login:
 iiab_admin_user: iiab-admin
+iiab_admin_user_group: iiab-admin    # 2020-10-13: Coming Soon?
 iiab_admin_published_pwd: g0adm1n    # For live checks/alerts of published pwds
 # Password hash to override above, if Ansible creates above user:
 iiab_admin_pwd_hash: $6$xsce51$D.IrrEeLBYIuJkGDmi27pZUGOwPFp98qpl3hxMwWV4hXigFGmdSvy3s/j7tn6OnyTTLmlV7SsN0lCUAFzxSop.
@@ -611,12 +615,6 @@ calibreweb_home: "{{ content_base }}/calibre-web"    # /library/calibre-web
 # =============================================================================
 # UNMAINTAINED LEGACY VARIABLES: YOU'RE TAKING BIG RISKS IF YOU USE ANY HERE...
 
-# CONSIDER THESE NEW OPENSTREETMAP (OSM) APPROACHES INSTEAD:
-#
-# 2019: https://github.com/iiab/iiab/wiki/IIAB-Maps SEE ABOVE osm_vector_maps_*
-# 2018: http://download.iiab.io/content/OSM/vector-tiles/
-# 2017: http://oer2go.org/viewmod/en-worldmap-10
-#
 # Unmaintained
 # osm_install: False
 # osm_enabled: False
@@ -628,10 +626,6 @@ calibreweb_home: "{{ content_base }}/calibre-web"    # /library/calibre-web
 # docker_install: False
 # docker_enabled: False
 
-# THOSE ABOVE WERE STILL OCCASIONALLY USED AS OF NOVEMBER 2019.
-# =============================================================================
-# THOSE BELOW WERE *NOT* USED FOR YEARS, AS OF NOVEMBER 2019.
-
 # Unmaintained
 # authserver_install: False
 # authserver_enabled: False
@@ -687,7 +681,7 @@ calibreweb_home: "{{ content_base }}/calibre-web"    # /library/calibre-web
 
 # OS-DEPENDENT VARS: TURN OFF ALL VARS BELOW AND THEN THE CORRECT
 # /opt/iiab/iiab/vars/<OS>.yml WILL TURN ON WHAT'S APPROPRIATE.  See "How This
-# Works" ~30 lines below, and https://github.com/iiab/iiab/wiki/IIAB-Platforms
+# Works" ~32 lines below, and https://github.com/iiab/iiab/wiki/IIAB-Platforms
 
 # Wide to narrow (insofar as poss)
 is_debuntu: False    # Covers all 4: Ubuntu, Linux Mint, Debian, Raspberry Pi OS (Raspbian)