diff --git a/home.md b/home.md
index 62529c7..ea7230c 100644
--- a/home.md
+++ b/home.md
@@ -44,6 +44,7 @@ The buzzer is the first giveaway, plus the lack of a main relay.
 The controller will also just be a basic pot and switches.
 <img src="uploads/6223395aceecf806fb5fa7fe0bd50b46/NOTbluewire.PNG" alt="Not blue wire" width="350"/>
 <img src="uploads/e29a446518cb83a78133dd21a18ab0b5/IncompatibleHeater.PNG" alt="Not blue wire" width="350"/>  
+This sort of controller has the right plug, but wrong protocol - it cannot be replaced with an Afterburner.![Incompatible](uploads/958c2e12ffc45e82c51c1057ff46b8f2/Incompatible.jpg)
 
 ## Software design