diff --git a/assets/instance_buttons.js b/assets/instance_buttons.js
index 7bb2bd8..6c2bfc1 100644
--- a/assets/instance_buttons.js
+++ b/assets/instance_buttons.js
@@ -1,6 +1,4 @@
-const SLOTS = 5;
-
-import {known_load, known_save} from './known_instances.js';
+import {SLOTS, normalize_known, known_load, known_save} from './known_instances.js';
 
 (function instance_buttons(){
 
@@ -33,41 +31,11 @@ import {known_load, known_save} from './known_instances.js';
         return known;
     }
 
-    function normalize(known){
-        /*
-
-        move instances with the most hits to the top SLOTS slots,
-        making sure not to reorder anything that is already there
-
-        */
-        let head = known.slice(0, SLOTS);
-        let tail = known.slice(SLOTS);
-
-        if(tail.length == 0){
-            return known;
-        }
-
-        for(let i = 0; i < SLOTS; i++){
-            let head_min = head.reduce((acc, cur) => acc.hits < cur.hits ? acc : cur);
-            let tail_max = tail.reduce((acc, cur) => acc.hits > cur.hits ? acc : cur);
-            if(head_min.hits < tail_max.hits){
-                // swappy
-                let i = head.indexOf(head_min);
-                let j = tail.indexOf(tail_max);
-                let buf = head[i];
-                head[i] = tail[j];
-                tail[j] = buf;
-            }
-        }
-
-        return head.concat(tail)
-    }
-
 
     async function replace_buttons(){
         let known = await get_known();
 
-        known = normalize(known);
+        known = normalize_known(known);
         known_save(known);
 
         let filtered_top_instances = []
diff --git a/assets/known_instances.js b/assets/known_instances.js
index f75509f..eb1e746 100644
--- a/assets/known_instances.js
+++ b/assets/known_instances.js
@@ -1,4 +1,5 @@
 const STORAGE_KEY = 'forget_known_instances';
+export const SLOTS = 5;
 
 export function known_save(known){
     localStorage.setItem(STORAGE_KEY, JSON.stringify(known));
@@ -11,3 +12,33 @@ export function known_load(){
     }
     return known;
 }
+
+export function normalize_known(known){
+    /*
+
+    move instances with the most hits to the top SLOTS slots,
+    making sure not to reorder anything that is already there
+
+    */
+    let head = known.slice(0, SLOTS);
+    let tail = known.slice(SLOTS);
+
+    if(tail.length == 0){
+        return known;
+    }
+
+    for(let i = 0; i < SLOTS; i++){
+        let head_min = head.reduce((acc, cur) => acc.hits < cur.hits ? acc : cur);
+        let tail_max = tail.reduce((acc, cur) => acc.hits > cur.hits ? acc : cur);
+        if(head_min.hits < tail_max.hits){
+            // swappy
+            let i = head.indexOf(head_min);
+            let j = tail.indexOf(tail_max);
+            let buf = head[i];
+            head[i] = tail[j];
+            tail[j] = buf;
+        }
+    }
+
+    return head.concat(tail)
+}