diff --git a/app-proto/full-interface/src/assembly.rs b/app-proto/full-interface/src/assembly.rs
index 6fac59f..1d0a6f8 100644
--- a/app-proto/full-interface/src/assembly.rs
+++ b/app-proto/full-interface/src/assembly.rs
@@ -1,6 +1,6 @@
 use nalgebra::DVector;
-use rustc_hash::FxHashSet;
 use slab::Slab;
+use std::collections::BTreeSet;
 use sycamore::prelude::*;
 
 #[derive(Clone, PartialEq)]
@@ -9,7 +9,7 @@ pub struct Element {
     pub label: String,
     pub color: [f32; 3],
     pub rep: DVector<f64>,
-    pub constraints: FxHashSet<usize>
+    pub constraints: BTreeSet<usize>
 }
 
 #[derive(Clone)]
diff --git a/app-proto/full-interface/src/main.rs b/app-proto/full-interface/src/main.rs
index 2f31ada..e867ad3 100644
--- a/app-proto/full-interface/src/main.rs
+++ b/app-proto/full-interface/src/main.rs
@@ -5,6 +5,7 @@ mod outline;
 
 use nalgebra::DVector;
 use rustc_hash::FxHashSet;
+use std::collections::BTreeSet;
 use sycamore::prelude::*;
 
 use add_remove::AddRemove;
@@ -37,7 +38,7 @@ fn main() {
                     label: String::from("Wing A"),
                     color: [1.00_f32, 0.25_f32, 0.00_f32],
                     rep: DVector::<f64>::from_column_slice(&[0.5, 0.5, 0.0, 0.5, -0.25]),
-                    constraints: FxHashSet::default()
+                    constraints: BTreeSet::default()
                 }
             )
         );
@@ -48,7 +49,7 @@ fn main() {
                     label: String::from("Wing B"),
                     color: [0.00_f32, 0.25_f32, 1.00_f32],
                     rep: DVector::<f64>::from_column_slice(&[-0.5, -0.5, 0.0, 0.5, -0.25]),
-                    constraints: FxHashSet::default()
+                    constraints: BTreeSet::default()
                 },
             )
         );
@@ -59,7 +60,7 @@ fn main() {
                     label: String::from("Central"),
                     color: [0.75_f32, 0.75_f32, 0.75_f32],
                     rep: DVector::<f64>::from_column_slice(&[0.0, 0.0, 0.0, 0.4, -0.625]),
-                    constraints: FxHashSet::default()
+                    constraints: BTreeSet::default()
                 }
             )
         );
diff --git a/app-proto/full-interface/src/outline.rs b/app-proto/full-interface/src/outline.rs
index be5a9b1..8a0a3fb 100644
--- a/app-proto/full-interface/src/outline.rs
+++ b/app-proto/full-interface/src/outline.rs
@@ -148,7 +148,7 @@ pub fn Outline() -> View {
                         }
                     }
                 },
-                key=|(key, _)| key.clone()
+                key=|(key, elt)| (key.clone(), elt.constraints.clone())
             )
         }
     }