diff --git a/app.js b/app.js
index e61f71ea..0f03adc0 100644
--- a/app.js
+++ b/app.js
@@ -277,6 +277,7 @@ const script = {
         "kiri/main",
         "kiri/init",
         "kiri/export",
+        "kiri/tools",
         "@devices",
         "@icons"
     ].map(p => p.charAt(0) !== '@' ? `src/${p}.js` : p),
diff --git a/src/kiri.js b/src/kiri.js
index 32dd7354..6c7651cf 100644
--- a/src/kiri.js
+++ b/src/kiri.js
@@ -5,10 +5,11 @@
 (function () {
 
     if (!self.kiri) {
-        self.kiri = {
+        let kiri = self.kiri = {
             beta: 3029,
             driver: {}, // driver modules
-            loader: []  // module loading: array of functions
+            loader: [], // module loading: array of functions
+            load: (fn) => kiri.loader.push(fn)
         };
     }
 
diff --git a/src/kiri/init.js b/src/kiri/init.js
index 351238ef..d3324560 100644
--- a/src/kiri/init.js
+++ b/src/kiri/init.js
@@ -2604,6 +2604,7 @@
         $('mode-cam').onclick = () => { API.mode.set('CAM') };
         $('mode-laser').onclick = () => { API.mode.set('LASER') };
         $('unrotate').onclick = () => { API.widgets.for(w => w.unrotate()) };
+        $('lay-flat').onclick = () => { API.event.emit("tool.mesh.lay-flat") };
         // rotation buttons
         let d = (Math.PI / 180) * 5;
         $('rot_x_lt').onclick = () => { API.selection.rotate(-d,0,0) };
diff --git a/src/kiri/main.js b/src/kiri/main.js
index f14a3911..35b7ba73 100644
--- a/src/kiri/main.js
+++ b/src/kiri/main.js
@@ -3202,6 +3202,7 @@
 
     // new module loading
     kiri.loader.forEach(mod => { mod(kiri.api)} );
+    kiri.load = (mod) => { mod(kiri.api) };
 
     // upon restore, seed presets
     API.event.emit('preset', API.conf.dbo());
diff --git a/src/kiri/tools.js b/src/kiri/tools.js
new file mode 100644
index 00000000..4c700651
--- /dev/null
+++ b/src/kiri/tools.js
@@ -0,0 +1,5 @@
+kiri.load(function(api) {
+    api.event.on('tool.mesh.lay-flat', () => {
+        // console.log('initiate lay-flat');
+    });
+});
\ No newline at end of file
diff --git a/web/kiri/index.html b/web/kiri/index.html
index c0baf042..4a3750d7 100644
--- a/web/kiri/index.html
+++ b/web/kiri/index.html
@@ -120,7 +120,7 @@
                             <div><i id="rot_z_gt" class="fas fa-chevron-right"></i></div>
                             <input id="rot_z" class="value center" size="6" value="0">
                             <div class="buttons f-row">
-                                <!-- <button id="lay-flat" class="grow">lay flat</button> -->
+                                <button id="lay-flat" class="grow">lay flat</button>
                                 <button id="unrotate" class="grow" lk="reset">reset</button>
                             </div>
                         </div>