diff --git a/doc/sdcard.txt b/doc/sdcard.txt
index 323056e..ac4ffe3 100644
--- a/doc/sdcard.txt
+++ b/doc/sdcard.txt
@@ -1,3 +1,6 @@
 SD slide-in-slide-out
 Ordered part: 
-ALPS SCHD3A0100
\ No newline at end of file
+ALPS SCHD3A0100
+
+some 3d model found here
+https://github.com/bfrigon/kicad-library