diff --git a/app-proto/src/add_remove.rs b/app-proto/src/add_remove.rs
index 7fe986e..448119b 100644
--- a/app-proto/src/add_remove.rs
+++ b/app-proto/src/add_remove.rs
@@ -9,6 +9,7 @@ use crate::{
     AppState,
     assembly::{
         Assembly,
+        Element,
         ElementColor,
         InversiveDistanceRegulator,
         Point,
@@ -253,15 +254,16 @@ fn load_irisawa_hexlet_assemb(assembly: &Assembly) {
         let _ = assembly.try_insert_element(sphere);
     }
     
-    // fix the curvature of the outer sphere
+    // put the outer sphere in ghost mode and fix its curvature
     let outer = assembly.elements_by_id.with_untracked(
         |elts_by_id| elts_by_id["outer"].clone()
     );
+    outer.ghost().set(true);
     let outer_curvature_regulator = outer.regulators().with_untracked(
         |regs| regs.first().unwrap().clone()
     );
     outer_curvature_regulator.set_point().set(
-        SpecifiedValue::try_from((1.0 / 3.0/*30.0*/).to_string()).unwrap()
+        SpecifiedValue::try_from((1.0 / 3.0).to_string()).unwrap()
     );
     
     // impose the desired tangencies
@@ -355,7 +357,7 @@ fn load_radius_ratio_assemb(assembly: &Assembly) {
     // create the faces
     let base_dir = Vector3::new(1.0, 0.75, 1.0).normalize();
     let offset = base_dir.dot(&Vector3::new(-0.6, 0.8, 0.6));
-    let faces =izip!(
+    let faces = izip!(
         index_range.clone(),
         [
             [1.00_f32, 0.00_f32, 0.25_f32],
@@ -380,6 +382,7 @@ fn load_radius_ratio_assemb(assembly: &Assembly) {
         }
     );
     for face in faces {
+        face.ghost().set(true);
         let _ = assembly.try_insert_element(face);
     }