diff --git a/src/csui/src/PlayerUIWindow.vue b/src/csui/src/PlayerUIWindow.vue
index e8457e6..a56ea84 100644
--- a/src/csui/src/PlayerUIWindow.vue
+++ b/src/csui/src/PlayerUIWindow.vue
@@ -183,7 +183,7 @@ export default {
         // {id: 'videoSettings', label: 'Video settings', icon: 'crop'},
         {id: 'extensionSettings', label: 'Site and Extension options', icon: 'cogs' },
         {id: 'playerDetection', label: 'Player detection', icon: 'television-play'},
-        // {id: 'autodetectionSettings', label: 'Autodetection options', icon: ''},
+        {id: 'autodetectionSettings', label: 'Autodetection options', icon: ''},
         // {id: 'advancedOptions', label: 'Advanced options', icon: 'cogs' },
         // {id: 'debugging', label: 'Debugging', icon: 'bug-outline' }
         {id: 'changelog', label: 'What\'s new', icon: 'information-box-outline' },
diff --git a/src/ext/lib/aard/Aard.ts b/src/ext/lib/aard/Aard.ts
index b079905..1595d1d 100644
--- a/src/ext/lib/aard/Aard.ts
+++ b/src/ext/lib/aard/Aard.ts
@@ -4,9 +4,10 @@ import Logger from '../Logger';
 import Settings from '../Settings';
 import VideoData from '../video-data/VideoData';
 import { Corner } from './enums/corner.enum';
+import { VideoPlaybackState } from './enums/video-playback-state.enum';
 import { GlCanvas } from './gl/GlCanvas';
 import { AardCanvasStore } from './interfaces/aard-canvas-store.interface';
-import { AardDetectionSample, generateSampleArray } from './interfaces/aard-detection-sample.interface';
+import { AardDetectionSample, generateSampleArray, resetSamples } from './interfaces/aard-detection-sample.interface';
 import { AardStatus, initAardStatus } from './interfaces/aard-status.interface';
 import { AardTestResults, initAardTestResults, resetAardTestResults } from './interfaces/aard-test-results.interface';
 import { AardTimers, initAardTimers } from './interfaces/aard-timers.interface';
@@ -210,7 +211,7 @@ import { AardTimers, initAardTimers } from './interfaces/aard-timers.interface';
  *  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -
  *
  */
-class Aard {
+export class Aard {
 
   //#region configuration parameters
   private logger: Logger;
@@ -376,7 +377,9 @@ class Aard {
   private onAnimationFrame(ts: DOMHighResTimeStamp) {
     if (this.canTriggerFrameCheck()) {
       resetAardTestResults(this.testResults);
+      resetSamples(this.canvasSamples);
       this.main();
+    } else {
     }
     this.animationFrame = window.requestAnimationFrame( (ts: DOMHighResTimeStamp) => this.onAnimationFrame(ts));
   }
@@ -427,7 +430,8 @@ class Aard {
             this.settings.active.arDetect.canvasDimensions.sampleCanvas.height
           );
         }
-        if (! this.testResults.imageLine.invalidated) {
+        // Both need to be checked
+        if (! (this.testResults.imageLine.invalidated || this.testResults.guardLine.invalidated)) {
           // TODO: ensure no aspect ratio changes happen
           this.testResults.lastStage = 2;
           break;
@@ -625,6 +629,10 @@ class Aard {
       || this.testResults.guardLine.bottom < 0
       || this.testResults.guardLine.bottom > height
     ) {
+      // we also need to reset guardline if out-of-bounds was detected,
+      // otherwise edgeScan might not work correctly
+      this.testResults.guardLine.top = -1;
+      this.testResults.guardLine.bottom = -1;
       this.testResults.guardLine.invalidated = true;
       return;
     }
@@ -1047,7 +1055,7 @@ class Aard {
 
     // Detect upper edge
     {
-      row = topStart;
+      row = Math.max(topStart, 0);
       x = 0;
       isImage = false;
       finishedRows = 0;
@@ -1063,16 +1071,16 @@ class Aard {
 
           // check for image, after we're done `x` points to alpha channel
           isImage =
-            imageData[rowOffset + x++] > this.testResults.blackLevel
-            || imageData[rowOffset + x++] > this.testResults.blackLevel
-            || imageData[rowOffset + x++] > this.testResults.blackLevel;
+            imageData[rowOffset + x] > this.testResults.blackLevel
+            || imageData[rowOffset + x + 1] > this.testResults.blackLevel
+            || imageData[rowOffset + x + 2] > this.testResults.blackLevel;
 
           if (!isImage) {
             // TODO: maybe some day mark this pixel as checked by writing to alpha channel
             i++;
             continue;
           }
-          if (!this.canvasSamples.top[i]) {
+          if (this.canvasSamples.top[i] === -1) {
             this.canvasSamples.top[i] = row;
             finishedRows++;
           }
@@ -1111,16 +1119,16 @@ class Aard {
 
           // check for image, after we're done `x` points to alpha channel
           isImage =
-            imageData[rowOffset + x++] > this.testResults.blackLevel
-            || imageData[rowOffset + x++] > this.testResults.blackLevel
-            || imageData[rowOffset + x++] > this.testResults.blackLevel;
+            imageData[rowOffset + x] > this.testResults.blackLevel
+            || imageData[rowOffset + x + 1] > this.testResults.blackLevel
+            || imageData[rowOffset + x + 2] > this.testResults.blackLevel;
 
           if (!isImage) {
             // TODO: maybe some day mark this pixel as checked by writing to alpha channel
             i++;
             continue;
           }
-          if (!this.canvasSamples.bottom[i]) {
+          if (this.canvasSamples.bottom[i] === -1) {
             this.canvasSamples.bottom[i] = row;
             finishedRows++;
           }
@@ -1131,8 +1139,6 @@ class Aard {
         if (finishedRows >= detectionLimit) {
           break;
         }
-
-        row++;
       }
     }
   }
@@ -1306,7 +1312,7 @@ class Aard {
       // didn't change meaningfully from the first, in which chance we aren't. If the brightness increased
       // anywhere between 'not enough' and 'too much', we mark the measurement as invalid.
       if (lastSubpixel - firstSubpixel > this.settings.active.arDetect.edgeDetection.gradientTestMinDelta) {
-        this.canvasSamples.top[i] = -1;
+        this.canvasSamples.bottom[i] = -1;
       }
 
     }
@@ -1610,6 +1616,12 @@ class Aard {
       this.testResults.aspectRatioUncertain = true;
       return;
     }
+    if (maxOffset > 2) {
+      this.testResults.imageLine.top = this.testResults.aspectRatioCheck.topCandidate === Infinity ? -1 : this.testResults.aspectRatioCheck.topCandidate;
+      this.testResults.imageLine.bottom = this.testResults.aspectRatioCheck.bottomCandidate === Infinity ? -1 : this.testResults.aspectRatioCheck.bottomCandidate;
+      this.testResults.guardLine.top = Math.max(this.testResults.imageLine.top - 2, 0);
+      this.testResults.guardLine.bottom = Math.max(this.testResults.imageLine.bottom + 2, this.canvasStore.main.height - 1);
+    }
     this.testResults.aspectRatioUncertain = false;
     this.testResults.letterboxWidth = candidateAvg;
     this.testResults.letterboxOffset = diff;
diff --git a/src/ext/lib/aard/enums/video-playback-state.enum.ts b/src/ext/lib/aard/enums/video-playback-state.enum.ts
index 0500882..44ab55e 100644
--- a/src/ext/lib/aard/enums/video-playback-state.enum.ts
+++ b/src/ext/lib/aard/enums/video-playback-state.enum.ts
@@ -1,4 +1,4 @@
-enum VideoPlaybackState {
+export enum VideoPlaybackState {
   NotInitialized,
   Playing,
   Paused,
diff --git a/src/ext/lib/aard/interfaces/aard-status.interface.ts b/src/ext/lib/aard/interfaces/aard-status.interface.ts
index 14931fe..5055a3b 100644
--- a/src/ext/lib/aard/interfaces/aard-status.interface.ts
+++ b/src/ext/lib/aard/interfaces/aard-status.interface.ts
@@ -1,3 +1,5 @@
+import {VideoPlaybackState} from '../enums/video-playback-state.enum';
+
 export interface AardStatus {
   aardActive: boolean,
   checkInProgress: boolean,
diff --git a/src/ext/lib/aard/interfaces/aard-test-results.interface.ts b/src/ext/lib/aard/interfaces/aard-test-results.interface.ts
index d77c02b..8b99b0d 100644
--- a/src/ext/lib/aard/interfaces/aard-test-results.interface.ts
+++ b/src/ext/lib/aard/interfaces/aard-test-results.interface.ts
@@ -74,7 +74,8 @@ export function resetAardTestResults(results: AardTestResults): void {
   results.isFinished = false;
   results.lastStage = 0;
   results.notLetterbox = false;
-  results.guardLine.invalidated = false
+  results.imageLine.invalidated = false;
+  results.guardLine.invalidated = false;
   results.guardLine.cornerViolations[0] = false;
   results.guardLine.cornerViolations[1] = false;
   results.guardLine.cornerViolations[2] = false;
diff --git a/src/ext/lib/video-data/VideoData.ts b/src/ext/lib/video-data/VideoData.ts
index f806734..350e82c 100644
--- a/src/ext/lib/video-data/VideoData.ts
+++ b/src/ext/lib/video-data/VideoData.ts
@@ -1,7 +1,6 @@
 import Debug from '../../conf/Debug';
 import PlayerData from './PlayerData';
 import Resizer from '../video-transform/Resizer';
-import ArDetector from '../ar-detect/ArDetector';
 import AspectRatioType from '../../../common/enums/AspectRatioType.enum';
 import CropModePersistence from '../../../common/enums/CropModePersistence.enum';
 import * as _ from 'lodash';
@@ -16,6 +15,7 @@ import { SiteSettings } from '../settings/SiteSettings';
 import { Ar } from '../../../common/interfaces/ArInterface';
 import { ExtensionStatus } from './ExtensionStatus';
 import { RunLevel } from '../../enum/run-level.enum';
+import { Aard } from '../aard/Aard';
 
 /**
  * VideoData — handles CSS for the video element.
@@ -70,7 +70,9 @@ class VideoData {
   pageInfo: PageInfo;
   player: PlayerData;
   resizer: Resizer;
-  arDetector: ArDetector;
+
+  aard: Aard;
+
   eventBus: EventBus;
   extensionStatus: ExtensionStatus;
   //#endregion
@@ -240,7 +242,15 @@ class VideoData {
       return;
     }
     this.resizer = new Resizer(this);
-    this.arDetector = new ArDetector(this);  // this starts Ar detection. needs optional parameter that prevents ArDetector from starting
+
+    console.log('before init aard');
+    try {
+      this.aard = new Aard(this);  // this starts Ar detection. needs optional parameter that prevents ArDetector from starting
+      console.log('after init aard');
+    } catch (e) {
+      console.error('Failed to start Aard!', e);
+    }
+
 
     this.logger.log('info', ['debug', 'init'], '[VideoData::ctor] Created videoData with vdid', this.vdid);
 
@@ -358,10 +368,10 @@ class VideoData {
     this.eventBus?.unsetUpstreamBus();
 
     try {
-      this.arDetector.stop();
-      this.arDetector.destroy();
+      this.aard.stop();
+      // this.arDetector.destroy();
     } catch (e) {}
-    this.arDetector = undefined;
+    this.aard = undefined;
     try {
       this.resizer.destroy();
     } catch (e) {}
@@ -419,7 +429,7 @@ class VideoData {
   disable(options?: {fromPlayer?: boolean}) {
     this.enabled = false;
 
-    this.arDetector?.stop();
+    this.aard?.stop();
 
     this.video.classList.remove(this.baseCssName);
     this.video.classList.remove(this.userCssClassName);
@@ -662,12 +672,8 @@ class VideoData {
       // throw {error: 'VIDEO_DATA_DESTROYED', data: {videoData: this}};
       return;
     }
-    if (this.arDetector){
-      this.arDetector.init();
-    }
-    else{
-      this.arDetector = new ArDetector(this);
-      this.arDetector.init();
+    if (! this.aard){
+      this.aard = new Aard(this);
     }
   }
 
@@ -686,24 +692,24 @@ class VideoData {
         this.hasDrm = false;
       }
 
-      if (!this.arDetector) {
+      if (!this.aard) {
         this.initArDetection();
       }
-      this.arDetector.start();
+      this.aard.start();
     } catch (e) {
       this.logger.log('warn', 'debug', '[VideoData::startArDetection()] Could not start aard for some reason. Was the function was called too early?', e);
     }
   }
 
   resumeAutoAr(){
-    if(this.arDetector){
+    if(this.aard){
       this.startArDetection();
     }
   }
 
   stopArDetection() {
-    if (this.arDetector) {
-      this.arDetector.stop();
+    if (this.aard) {
+      this.aard.stop();
     }
   }
   //#endregion
diff --git a/src/ext/lib/video-transform/Resizer.ts b/src/ext/lib/video-transform/Resizer.ts
index 86fd07e..3853824 100644
--- a/src/ext/lib/video-transform/Resizer.ts
+++ b/src/ext/lib/video-transform/Resizer.ts
@@ -286,10 +286,10 @@ class Resizer {
 
     // handle autodetection stuff
     if (ar.type === AspectRatioType.Automatic) {
-      this.videoData.arDetector?.start();
+      this.videoData.aard?.start();
       return;
     } else if (ar.type !== AspectRatioType.AutomaticUpdate) {
-      this.videoData.arDetector?.stop();
+      this.videoData.aard?.stop();
     }
 
     if (ar.type !== AspectRatioType.AutomaticUpdate) {
@@ -357,11 +357,11 @@ class Resizer {
     //
     // unpause when using other modes
     if ((ar.type !== AspectRatioType.Automatic && ar.type !== AspectRatioType.AutomaticUpdate) || this.stretcher.mode === StretchType.Basic) {
-      this.videoData?.arDetector?.pause();
+      this.videoData?.aard?.stop();
     } else {
       if (ar.type !== AspectRatioType.AutomaticUpdate) {
         if (this.lastAr.type === AspectRatioType.Automatic || this.lastAr.type === AspectRatioType.AutomaticUpdate) {
-          this.videoData?.arDetector?.unpause();
+          this.videoData?.aard?.stop();
         }
       }
     }