diff --git a/slicer/README.md b/slicer/README.md
index 5603267..6452beb 100644
--- a/slicer/README.md
+++ b/slicer/README.md
@@ -9,10 +9,9 @@ It also exposes a CLI for slicing models, open the dropdown below to see it's he
 ```plain
 mslicer command line interface
 
-Usage: slicer [OPTIONS] <MESH|--position <POSITION>|--rotation <ROTATION>|--scale <SCALE>> <OUTPUT>
+Usage: slicer [OPTIONS] <--mesh <MESH>|--position <POSITION>|--rotation <ROTATION>|--scale <SCALE>> <OUTPUT>
 
 Arguments:
-  <MESH>    Path to a .stl or .obj file
   <OUTPUT>  File to save sliced result to. Currently only .goo files can be generated
 
 Options:
@@ -42,12 +41,14 @@ Options:
           The speed to lift the platform after exposing each first layer, in mm/min [default: 65]
       --first-retract-speed <FIRST_RETRACT_SPEED>
           The speed to retract (move down) the platform after exposing each first layer, in mm/min [default: 150]
+      --mesh <MESH>
+          Path to a .stl or .obj file
       --position <POSITION>
-          Location of the bottom center of model bounding box. The origin is the center of the build plate [default: "0, 0, 0"]
+          Location of the bottom center of model bounding box. The origin is the center of the build plate
       --rotation <ROTATION>
-          Rotation of the model in degrees, pitch, roll, yaw [default: "0, 0, 0"]
+          Rotation of the model in degrees, pitch, roll, yaw
       --scale <SCALE>
-          Scale of the model along the X, Y, and Z axes [default: "1, 1, 1"]
+          Scale of the model along the X, Y, and Z axes
   -h, --help
           Print help
 ```
diff --git a/slicer/bin/args.rs b/slicer/bin/args.rs
index 56e8c0b..5226bcb 100644
--- a/slicer/bin/args.rs
+++ b/slicer/bin/args.rs
@@ -89,7 +89,7 @@ pub struct ModelArgs {
     pub scale: Vec<Vector3<f32>>,
 }
 
-#[derive(Default, Debug)]
+#[derive(Debug)]
 pub struct CliMesh {
     pub path: PathBuf,
     pub position: Vector3<f32>,
@@ -128,7 +128,7 @@ impl CliMesh {
     pub fn from_matches(matches: &ArgMatches) -> Vec<Self> {
         let mut meshes = matches
             .get_many::<PathBuf>("mesh")
-            .unwrap()
+            .expect("No meshes defined")
             .zip(matches.indices_of("mesh").unwrap())
             .map(|x| {
                 (
@@ -152,7 +152,10 @@ impl CliMesh {
             };
 
             for (instance, idx) in instances.zip(matches.indices_of(key).unwrap()) {
-                let mesh = meshes.iter_mut().rfind(|x| idx > x.0).unwrap();
+                let mesh = meshes
+                    .iter_mut()
+                    .rfind(|x| idx > x.0)
+                    .expect("Mesh parameter before mesh");
                 *value(&mut mesh.1) = instance.to_owned();
             }
         }
@@ -165,6 +168,17 @@ impl CliMesh {
     }
 }
 
+impl Default for CliMesh {
+    fn default() -> Self {
+        Self {
+            path: PathBuf::default(),
+            position: Vector3::zeros(),
+            rotation: Vector3::zeros(),
+            scale: Vector3::repeat(1.0),
+        }
+    }
+}
+
 pub fn vector_value_parser<T, const N: usize>(
     raw: &str,
 ) -> Result<Matrix<T, Const<N>, U1, ArrayStorage<T, N, 1>>>