diff --git a/.gitignore b/.gitignore
index 95fa740..1b7c141 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,4 +13,5 @@ Cargo.lock
 # MSVC Windows builds of rustc generate these, which store debugging information
 *.pdb
 
-.idea/
\ No newline at end of file
+.idea/
+.DS_Store
diff --git a/models/v4.FCStd b/models/v4.FCStd
new file mode 100644
index 0000000..1b7029f
Binary files /dev/null and b/models/v4.FCStd differ