diff --git a/Temporary/OneSec Propulsion System.md b/Temporary/OneSec Propulsion System.md
index f298e69..aafa16d 100644
--- a/Temporary/OneSec Propulsion System.md	
+++ b/Temporary/OneSec Propulsion System.md	
@@ -11,10 +11,13 @@ tags:
 - Propulsion harness
 	- 4 servos:
 		- power 70V
-		- pwm line (2x)
+		- pwm line (2x) (shared per rotorhead)
 	- i2c line with 4 sensors:
 		- 2x angle sensor
 		- ambient light detection
 		- temperature and humidity sensor
 	- User RGB light
-	- 
\ No newline at end of file
+	- Deicing PWM, unused for now.
+- 2x 3 motor cables
+
+Each rotor head side has its own servo. Calibration is going to be a very difficult issue.
\ No newline at end of file