diff --git a/src/lib.rs b/src/lib.rs
index d8e7b84..f713b69 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -419,6 +419,26 @@ impl VmcMessage for VmcExtRootPos {
     }
 }
 
+impl VmcExtRootPos {
+    fn new(name: String, transform: Transform3D, mr_scale: Option<Vector3>, mr_offset: Option<Vector3>) -> Result<Self, MessageCreationErr> {
+        if mr_scale.is_some() && mr_offset.is_none() {
+            return Err(MessageCreationErr::OptionalArgs(CreateOptionalArgsErr { expected_sets: vec![String::from("None"), String::from("mr_scale, mr_offset")], actual: String::from("mr_scale"), calling_func: String::from("VmcExtRootPos::new")}));
+        }
+        if mr_scale.is_none() && mr_offset.is_some() {
+            return Err(MessageCreationErr::OptionalArgs(CreateOptionalArgsErr { expected_sets: vec![String::from("None"), String::from("mr_scale, mr_offset")], actual: String::from("mr_offset"), calling_func: String::from("VmcExtRootPos::new")}))
+        }
+        return Ok(VmcExtRootPos { name, transform, mr_scale, mr_offset});
+    }
+    fn new_vmc_message(name: String, transform: Transform3D, mr_scale: Option<Vector3>, mr_offset: Option<Vector3>) -> Result<Box<dyn VmcMessage>, MessageCreationErr> {
+        let message = Self::new(name, transform, mr_scale, mr_offset);
+        if message.is_ok() {
+            let boxed_result: Box<dyn VmcMessage> = Box::new(message.ok().unwrap());
+            return Ok(boxed_result);
+        }
+        return Err(message.err().unwrap());
+    }
+}
+
 #[derive(Debug)]
 struct VmcExtBonePos {
     name: String,