diff --git a/.gitattributes b/.gitattributes
index c94badc..e13cd50 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1 +1,2 @@
 *.stl filter=lfs diff=lfs merge=lfs -text
+*.pdf filter=lfs diff=lfs merge=lfs -text
diff --git a/DRAWINGS/HingePins.pdf b/DRAWINGS/HingePins.pdf
new file mode 100644
index 0000000..22e3f77
Binary files /dev/null and b/DRAWINGS/HingePins.pdf differ