diff --git a/vars/default_vars.yml b/vars/default_vars.yml
index c99fddfba..48555b782 100644
--- a/vars/default_vars.yml
+++ b/vars/default_vars.yml
@@ -129,14 +129,13 @@ schooltool_enabled: False
 # Needed if you want http://box/common/services/power_off.php to work
 allow_apache_sudo: False
 
-# HTTPD role runs here.
+# roles/httpd runs here
 
-# IIAB-ADMIN role runs here.
+# roles/iiab-admin runs here
 
-# MySQL - THESE HAVE NO EFFECT - DE FACTO DEFAULTS IN roles/1-prep/tasks/computed_vars.yml, roles/mysql/tasks/main.yml
+# MySQL MANDATORY - THESE SETTINGS HAVE NO EFFECT - SEE roles/1-prep/tasks/computed_vars.yml, roles/mysql/tasks/main.yml
 mysql_install: True
 mysql_enabled: True
-# password is fixmysql
 # mysql_root_password: $6$iiab51$3ICIW0CLWxxMW2a3yrHZ38ukZItD5tcadL4rWcE9D.qIGStxhh8rRsaSxoj3b.MYxI/VRDNjpzSYK/V6zkWFI0
 mysql_root_password: fixmysql
 
@@ -152,7 +151,7 @@ openvpn_cron_enabled: False
 openvpn_install: True
 openvpn_enabled: False
 
-# NETWORK role runs here.
+# roles/network runs here (MANY SETTINGS ABOVE)
 
 # Homepage
 # Default to the GUI where the selection is made or override in local_vars.yml
@@ -165,7 +164,8 @@ iiab_home_url: /home
 # iiab_home_url: /wordpress
 # iiab_home_url: /wiki - either dokuwiki or mediawiki
 
-# PostgreSQL - SEE roles/1-prep/tasks/computed_vars.yml, roles/4-server-options/tasks/main.yml, roles/postgresql/tasks/main.yml
+# PostgreSQL auto-installed by Moodle &/or Pathagar as nec, no need to touch!
+# roles/1-prep/tasks/computed_vars.yml, roles/4-server-options/tasks/main.yml
 postgresql_install: False
 postgresql_enabled: False
 
diff --git a/vars/medium.localvars b/vars/medium.localvars
index 3f2d9fd21..ac39788c6 100644
--- a/vars/medium.localvars
+++ b/vars/medium.localvars
@@ -45,9 +45,13 @@ dansguardian_enabled: False
 # wondershaper_install: False
 # wondershaper_enabled: False
 
+# 1-PREP
+
+# 2-COMMON
+
 # 3-BASE-SERVER
 
-# MySQL & PostgreSQL are auto-installed around here as necessary.
+# roles/mysql runs here (mandatory)
 
 # 4-SERVER-OPTIONS
 
@@ -58,6 +62,12 @@ openvpn_enabled: False
 # openvpn_cron_enabled: True
 # If changing the above, remember to run "cd /opt/iiab/iiab; ./runtags openvpn"
 
+# roles/network runs here (MANY SETTINGS ABOVE)
+
+# PostgreSQL - auto-installed by Moodle and/or Pathagar - no need to touch!
+postgresql_install: False
+postgresql_enabled: False
+
 # Unmaintained
 # authserver_install: False
 # authserver_enabled: False