diff --git a/helpful-tips-1/calibrate-your-extruder.md b/helpful-tips-1/calibrate-your-extruder.md
index fbc9c76..e5c1c72 100644
--- a/helpful-tips-1/calibrate-your-extruder.md
+++ b/helpful-tips-1/calibrate-your-extruder.md
@@ -2,5 +2,6 @@
 
 {% embed url="https://mattshub.com/2017/04/19/extruder-calibration/" %}
 
-
+This has been superceded by Rotation_Distance
+https://www.klipper3d.org/Rotation_Distance.html