diff --git a/making.md b/making.md
index afe912e..2c2ef2c 100644
--- a/making.md
+++ b/making.md
@@ -47,6 +47,7 @@
 
 ## Calibration guides
 
+* https://ellis3dp.com/Print-Tuning-Guide/
 * [J3DTech Guide to Resin 3D Printing - Google Docs](https://docs.google.com/document/d/1aoMSE6GBGMcoYXNGfPP9s_Jg8vr1wQmmZuvqP3suago/edit?tab=t.0#heading=h.gjdgxs)
 * [Printer Calibration – Lychee Documentation](https://doc.mango3d.io/doc/printer-calibration/)