diff --git a/CHANGELOG.md b/CHANGELOG.md
index 00f5795..fd8963b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,10 @@ See [Conventional Commits](https://conventionalcommits.org) for commit guideline
 
 ## Dev
 
+### Added
+
+- **client-api**: `toggleClustering(isOn)` to start/stop clustering
+
 ### Infra
 
 - Update Storybook from 6 to 7
@@ -13,6 +17,10 @@ See [Conventional Commits](https://conventionalcommits.org) for commit guideline
 
 - Update dependencies
 
+### Fix
+
+- **client-api**: `tickClustering(milliseconds)` now works, requires Graphistry server upgrade
+
 ## 4.6.1
 
 ### Added
diff --git a/projects/client-api-react/src/stories/GraphistryJS.stories.jsx b/projects/client-api-react/src/stories/GraphistryJS.stories.jsx
index f8264e4..b2bfcd7 100644
--- a/projects/client-api-react/src/stories/GraphistryJS.stories.jsx
+++ b/projects/client-api-react/src/stories/GraphistryJS.stories.jsx
@@ -12,7 +12,7 @@ import {
   toggleToolbar,
   toggleHistograms,
   toggleTimebars,
-  togglePlay,
+  toggleClustering,
   toggleInspector,
   encodeAxis,
   selectionUpdates,
@@ -443,14 +443,50 @@ export const verticalLayoutAndAxis = {
   },
 };
 
+
+
+export const tick = {
+  render: (args) => {
+    const iframe = useRef(null);
+    const [messages, setMessages] = useState(['loading...']);
+    const [g, setG] = useState(null);
+    const [tickCount, setTickCount] = useState(0);
+
+    const milliseconds = 2000;
+
+    useEffect(() => {
+      //////// Instantiate GraphistryJS for an iframe
+      graphistryJS(iframe.current)
+        .pipe(tap((g) => setG(g)))
+        .subscribe(
+          (g) => setMessages((arr) => arr.concat([`graphistryJS instantiated`, String(g)])),
+          (err) => {
+            console.error('Error:', err);
+            setMessages((arr) => arr.concat([`Error: ${err}`]))
+          },
+          () => setMessages((arr) => arr.concat(['Completed'])));
     }, [iframe]);
 
-    return (
-        <iframe
-            {...defaultIframeProps}
-            ref={iframe}
-            src={lesMisNoPlayNoSplash}
-            {...args}
-        />
-    );
-}
\ No newline at end of file
+    useEffect(() => {
+      if (!g || !tickCount) {
+        console.debug('tick not ready', {g, tickCount})
+        return;
+      }
+
+      of(g)
+      .pipe(
+        tickClustering(milliseconds)
+        //toggleClustering(tickCount % 2 == 1), //or as a toggle
+
+      ).subscribe(
+        () => setMessages((arr) => arr.concat([`ticked`])),
+        (err) => setMessages((arr) => arr.concat([`Error: ${err}`])),
+        () => setMessages((arr) => arr.concat(['Completed'])))
+    }, [tickCount]);
+
+    return <>
+      <button onClick={() => { setTickCount(tickCount + 1); }}>Run {milliseconds/1000}s of ticks</button>    
+      <iframe {...defaultIframeProps} ref={iframe} src={lesMisNoPlayNoSplash} {...args} />
+    </>;
+  },
+};
\ No newline at end of file
diff --git a/projects/client-api/src/index.js b/projects/client-api/src/index.js
index 3607643..db262e6 100644
--- a/projects/client-api/src/index.js
+++ b/projects/client-api/src/index.js
@@ -743,6 +743,15 @@ export function togglePanel(panel, turnOn) {
 }
 chainList.togglePanel = togglePanel;
 
+export function toggleClustering(selected) {
+    const values = [
+        $value(`scene.simulating`, selected),
+        $value(`scene.controls[0].selected`, selected)
+    ];
+    return makeSetter('view', ...values);
+}
+chainList.toggleClustering = toggleClustering;
+
 /**
  * @function encodeDefaultIcons
  * @description Change default (user-unset) icons based on an attribute. Pass undefined for attribute, mapping to clear.
@@ -995,8 +1004,8 @@ chainList.toggleHistograms = toggleHistograms;
 
 /**
  * @function Graphistry.tickClustering
- * @description Run a number of steps of Graphistry's clustering algorithm
- * @param {number} ticks - The number of ticks to run
+ * @description Run a number of milliseconds of Graphistry's clustering algorithm
+ * @param {number} ticks - The number of milliseconds to run
  * @return {@link GraphistryState} A {@link GraphistryState} {@link Observable} that emits the result of the operation
  * @example
  * GraphistryJS(document.getElementById('viz'))
@@ -1007,31 +1016,16 @@ chainList.toggleHistograms = toggleHistograms;
  *     .pipe(tickClustering(10))
  *     .subscribe();
  */
-export function tickClustering(/*ticks = 1*/) {
-
-    throw new Error('Not implemented');
-    /*
-
-    console.debug('tickClustering', {ticks});
-
+export function tickClustering(ticks = 1000) {
     if (typeof ticks !== 'number') {
         return map(g => g);
     }
-    return switchMap(g => {
-        return (
-            timer(0, 40)
-            .pipe(
-                tap((v) => console.debug('tick', v, g)),
-                take(Math.abs(ticks) || 1),
-                tap((v) => console.debug('tick b', v, g)),
-                map(() => g),
-                makeCaller('view', 'tick', [{}]),
-                isEmpty(),
-                tap((v) => console.debug('tick result', v, g)),
-                takeLast(1)
-            ));
-    });
-    */
+    return switchMap(g =>
+        of(g).pipe(
+            toggleClustering(true),
+            delay(ticks),
+            toggleClustering(false),
+            takeLast(1)));
 }
 chainList.tickClustering = tickClustering;
 
@@ -1308,7 +1302,7 @@ const G_API_SETTINGS = {
  * | `linLog` | `boolean` |
  * | `lockedX` | `boolean` | 
  * | `lockedY` | `boolean` | 
- * | `lockedR` | `boolean` | 
+ * | `lockedR` | `boolean` |
  * @function updateSetting
  * @param {string} name - the name of the setting to change
  * @param {string} val - the value to set the setting to.