diff --git a/vars/default_vars.yml b/vars/default_vars.yml
index 21c796a29..9fbbfd7af 100644
--- a/vars/default_vars.yml
+++ b/vars/default_vars.yml
@@ -654,8 +654,9 @@ calibreweb_home: "{{ content_base }}/calibre-web"    # /library/calibre-web
 # =============================================================================
 
 
-# PLATFORMS:
-# TURN ALL OFF AND LET /opt/iiab/iiab/vars/<OS>.yml TURN ON AS APPROPRIATE...
+# 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
 
 # Wide to narrow (insofar as poss)
 is_debuntu: False    # Covers all 3: Ubuntu, Debian, Raspbian
@@ -686,7 +687,18 @@ is_fedora_22: False
 is_fedora_18: False
 
 # How This Works:
-# 1. /opt/iiab/iiab/iiab-install copies scripts/local_facts.fact to /etc/ansible/facts.d/local_facts.fact
+#
+# 1. /opt/iiab/iiab/iiab-install copies /opt/iiab/iiab/scripts/local_facts.fact
+#    to /etc/ansible/facts.d/local_facts.fact
 # 2. Ansible runs /etc/ansible/facts.d/local_facts.fact to identify the OS
-# 3. Within /opt/iiab/iiab, ./iiab-install (iiab-stages.yml) or ./runrole (run-one-role.yml) or Admin Console (iiab-from-console.yml) invoke the correct /opt/iiab/iiab/vars/<OS>.yml
-# Longer Explanation: https://github.com/iiab/iiab/wiki/IIAB-Variables (Order of Execution and Precedence)
+# 3. The correct /opt/iiab/iiab/vars/<OS>.yml is then invoked by any the
+#    following high-level scripts in /opt/iiab/iiab for IIAB operators:
+#       ./iiab-install (uses iiab-stages.yml
+#       ./iiab-network (uses iiab-network.yml)
+#       ./runrole (uses run-one-role.yml)
+# 4. Likewise behind the scenes:
+#       ./iiab-configure (uses iiab-from-cmdline.yml)
+#       Admin Console (uses iiab-from-console.yml)
+#
+# More details, including Order of Execution and Precedence:
+# https://github.com/iiab/iiab/wiki/IIAB-Variables