diff --git a/User-Guide.md b/User-Guide.md
index 67aa7ba..ec8d146 100644
--- a/User-Guide.md
+++ b/User-Guide.md
@@ -7,6 +7,7 @@ Download the .zip file and extract it anywhere convenient.
 - In DCS, open the Mission Editor
 - Press the button to open a mission for editing, and navigate to the location you chose during installation, then RotorOps/Generator/Output
 - Open the mission you created and fine-tune the ground unit placement. 
+- You can add/change player helicopters, but make sure there is only one per group.
 - Click 'Fly' and have fun!
 
 You may also wish to change player helicopter selection or loadouts.  It is safe to swap player helicopters or add new ones.