diff --git a/e2e/playwright/code-pane-and-errors.spec.ts b/e2e/playwright/code-pane-and-errors.spec.ts
index ffef789f3..73e6605ce 100644
--- a/e2e/playwright/code-pane-and-errors.spec.ts
+++ b/e2e/playwright/code-pane-and-errors.spec.ts
@@ -2,7 +2,7 @@ import { test, expect } from './zoo-test'
 import {
   orRunWhenFullSuiteEnabled,
   getUtils,
-  executorInputPath,
+  kclSamplesInputPath,
 } from './test-utils'
 import { join } from 'path'
 import { bracket } from 'lib/exampleKcl'
@@ -250,11 +250,11 @@ test(
       ])
       await Promise.all([
         fsp.copyFile(
-          executorInputPath('router-template-slate.kcl'),
+          kclSamplesInputPath(['ball-bearing', 'main.kcl']),
           join(routerTemplateDir, 'main.kcl')
         ),
         fsp.copyFile(
-          executorInputPath('focusrite_scarlett_mounting_braket.kcl'),
+          kclSamplesInputPath(['flange', 'main.kcl']),
           join(bracketDir, 'main.kcl')
         ),
       ])
diff --git a/e2e/playwright/desktop-export.spec.ts b/e2e/playwright/desktop-export.spec.ts
index 91e340907..9cf67258e 100644
--- a/e2e/playwright/desktop-export.spec.ts
+++ b/e2e/playwright/desktop-export.spec.ts
@@ -4,6 +4,7 @@ import {
   getUtils,
   executorInputPath,
   getPlaywrightDownloadDir,
+  kclSamplesInputPath,
 } from './test-utils'
 import fsp from 'fs/promises'
 
@@ -20,11 +21,11 @@ test(
       await Promise.all([fsp.mkdir(bracketDir, { recursive: true })])
       await Promise.all([
         fsp.copyFile(
-          executorInputPath('router-template-slate.kcl'),
+          kclSamplesInputPath(['flange', 'main.kcl']),
           path.join(bracketDir, 'other.kcl')
         ),
         fsp.copyFile(
-          executorInputPath('focusrite_scarlett_mounting_braket.kcl'),
+          kclSamplesInputPath(['ball-bearing', 'main.kcl']),
           path.join(bracketDir, 'main.kcl')
         ),
       ])
diff --git a/e2e/playwright/fixtures/sceneFixture.ts b/e2e/playwright/fixtures/sceneFixture.ts
index d7189a672..b47538345 100644
--- a/e2e/playwright/fixtures/sceneFixture.ts
+++ b/e2e/playwright/fixtures/sceneFixture.ts
@@ -310,7 +310,9 @@ export async function expectPixelColor(
     .toBeTruthy()
     .catch((cause) => {
       throw new Error(
-        `ExpectPixelColor: expecting ${colour} got ${finalValue}`,
+        `ExpectPixelColor: point ${JSON.stringify(
+          coords
+        )} was expecting ${colour} but got ${finalValue}`,
         { cause }
       )
     })
diff --git a/e2e/playwright/machines.spec.ts b/e2e/playwright/machines.spec.ts
index 097e522de..f6cf419b6 100644
--- a/e2e/playwright/machines.spec.ts
+++ b/e2e/playwright/machines.spec.ts
@@ -1,5 +1,5 @@
 import { test, expect } from './zoo-test'
-import { executorInputPath } from './test-utils'
+import { executorInputPath, kclSamplesInputPath } from './test-utils'
 import { join } from 'path'
 import fsp from 'fs/promises'
 
@@ -11,7 +11,7 @@ test(
       const bracketDir = join(dir, 'bracket')
       await fsp.mkdir(bracketDir, { recursive: true })
       await fsp.copyFile(
-        executorInputPath('focusrite_scarlett_mounting_braket.kcl'),
+        kclSamplesInputPath(['flange', 'main.kcl']),
         join(bracketDir, 'main.kcl')
       )
     })
@@ -51,7 +51,7 @@ test(
       const bracketDir = join(dir, 'bracket')
       await fsp.mkdir(bracketDir, { recursive: true })
       await fsp.copyFile(
-        executorInputPath('focusrite_scarlett_mounting_braket.kcl'),
+        kclSamplesInputPath(['flange', 'main.kcl']),
         join(bracketDir, 'main.kcl')
       )
     })
diff --git a/e2e/playwright/projects.spec.ts b/e2e/playwright/projects.spec.ts
index 9a901db5c..a19bde832 100644
--- a/e2e/playwright/projects.spec.ts
+++ b/e2e/playwright/projects.spec.ts
@@ -8,6 +8,7 @@ import {
   createProject,
   getPlaywrightDownloadDir,
   orRunWhenFullSuiteEnabled,
+  kclSamplesInputPath,
 } from './test-utils'
 import fsp from 'fs/promises'
 import fs from 'fs'
@@ -86,7 +87,7 @@ test(
       const bracketDir = path.join(dir, 'bracket')
       await fsp.mkdir(bracketDir, { recursive: true })
       await fsp.copyFile(
-        executorInputPath('focusrite_scarlett_mounting_braket.kcl'),
+        kclSamplesInputPath(['flange', 'main.kcl']),
         path.join(bracketDir, 'main.kcl')
       )
     })
@@ -123,7 +124,7 @@ test(
       const bracketDir = path.join(dir, 'bracket')
       await fsp.mkdir(bracketDir, { recursive: true })
       await fsp.copyFile(
-        executorInputPath('focusrite_scarlett_mounting_braket.kcl'),
+        kclSamplesInputPath(['flange', 'main.kcl']),
         path.join(bracketDir, 'main.kcl')
       )
       const errorDir = path.join(dir, 'broken-code')
@@ -212,7 +213,7 @@ test(
       const bracketDir = path.join(dir, 'bracket')
       await fsp.mkdir(bracketDir, { recursive: true })
       await fsp.copyFile(
-        executorInputPath('focusrite_scarlett_mounting_braket.kcl'),
+        kclSamplesInputPath(['flange', 'main.kcl']),
         path.join(bracketDir, 'main.kcl')
       )
       const emptyDir = path.join(dir, 'empty')
@@ -289,7 +290,7 @@ test(
       const bracketDir = path.join(dir, 'bracket')
       await fsp.mkdir(bracketDir, { recursive: true })
       await fsp.copyFile(
-        executorInputPath('focusrite_scarlett_mounting_braket.kcl'),
+        kclSamplesInputPath(['flange', 'main.kcl']),
         path.join(bracketDir, 'main.kcl')
       )
 
@@ -355,7 +356,7 @@ test(
       const bracketDir = path.join(dir, 'bracket')
       await fsp.mkdir(bracketDir, { recursive: true })
       await fsp.copyFile(
-        executorInputPath('focusrite_scarlett_mounting_braket.kcl'),
+        kclSamplesInputPath(['flange', 'main.kcl']),
         path.join(bracketDir, 'main.kcl')
       )
       await fsp.copyFile(
@@ -474,7 +475,7 @@ test.describe('Can export from electron app', () => {
           const bracketDir = path.join(dir, 'bracket')
           await fsp.mkdir(bracketDir, { recursive: true })
           await fsp.copyFile(
-            executorInputPath('focusrite_scarlett_mounting_braket.kcl'),
+            kclSamplesInputPath(['flange', 'main.kcl']),
             path.join(bracketDir, 'main.kcl')
           )
         })
diff --git a/e2e/playwright/regression-tests.spec.ts b/e2e/playwright/regression-tests.spec.ts
index a938b9fb5..854723cac 100644
--- a/e2e/playwright/regression-tests.spec.ts
+++ b/e2e/playwright/regression-tests.spec.ts
@@ -4,7 +4,7 @@ import path from 'path'
 import * as fsp from 'fs/promises'
 import {
   getUtils,
-  executorInputPath,
+  kclSamplesInputPath,
   TEST_COLORS,
   TestColor,
   orRunWhenFullSuiteEnabled,
@@ -582,7 +582,7 @@ extrude002 = extrude(profile002, length = 150)
         const bracketDir = path.join(dir, 'bracket')
         await fsp.mkdir(bracketDir, { recursive: true })
         await fsp.copyFile(
-          executorInputPath('focusrite_scarlett_mounting_braket.kcl'),
+          kclSamplesInputPath(['flange', 'main.kcl']),
           path.join(bracketDir, 'main.kcl')
         )
       })
@@ -632,12 +632,13 @@ extrude002 = extrude(profile002, length = 150)
 
     await test.step(`Load an empty file`, async () => {
       await page.addInitScript(async () => {
-        localStorage.setItem('persistCode', '')
+        localStorage.setItem('persistCode', '@settings(defaultLengthUnit = in)')
       })
       await page.setBodyDimensions({ width: 1200, height: 500 })
       await homePage.goToModelingScene()
       await u.waitForPageLoad()
       await u.closeKclCodePanel()
+      await page.waitForTimeout(20)
     })
 
     await test.step(`Zoom out until you can't see the default planes`, async () => {
@@ -646,13 +647,14 @@ extrude002 = extrude(profile002, length = 150)
           timeout: 5000,
           message: 'Plane color is visible',
         })
-        .toBeLessThanOrEqual(15)
+        .toBeLessThanOrEqual(20)
 
       let maxZoomOuts = 10
       let middlePixelIsBackgroundColor =
         (await middlePixelIsColor(bgColor)) < 10
       while (!middlePixelIsBackgroundColor && maxZoomOuts > 0) {
         await page.keyboard.down('Control')
+        await page.waitForTimeout(20)
         await page.mouse.move(600, 460)
         await page.mouse.down({ button: 'right' })
         await page.mouse.move(600, 50, { steps: 20 })
@@ -660,7 +662,7 @@ extrude002 = extrude(profile002, length = 150)
         await page.keyboard.up('Control')
         await page.waitForTimeout(100)
         maxZoomOuts--
-        middlePixelIsBackgroundColor = (await middlePixelIsColor(bgColor)) < 10
+        middlePixelIsBackgroundColor = (await middlePixelIsColor(bgColor)) < 15
       }
 
       expect(middlePixelIsBackgroundColor, {
@@ -678,13 +680,12 @@ extrude002 = extrude(profile002, length = 150)
     homePage,
     scene,
     toolbar,
-    viewport,
   }) => {
     await context.folderSetupFn(async (dir) => {
       const legoDir = path.join(dir, 'lego')
       await fsp.mkdir(legoDir, { recursive: true })
       await fsp.copyFile(
-        executorInputPath('lego.kcl'),
+        kclSamplesInputPath(['ball-bearing', 'main.kcl']),
         path.join(legoDir, 'main.kcl')
       )
     })
@@ -697,11 +698,8 @@ extrude002 = extrude(profile002, length = 150)
       await scene.loadingIndicator.waitFor({ state: 'detached' })
     })
     await test.step(`The part should start loading quickly, not waiting until execution is complete`, async () => {
-      await scene.expectPixelColor(
-        [143, 143, 143],
-        { x: (viewport?.width ?? 1200) / 2, y: (viewport?.height ?? 500) / 2 },
-        15
-      )
+      // TODO: use the viewport size to pick the center point, but the `viewport` fixutre's values were wrong.
+      await scene.expectPixelColor([143, 143, 143], { x: 500, y: 250 }, 15)
     })
   })
 
diff --git a/e2e/playwright/sketch-tests.spec.ts b/e2e/playwright/sketch-tests.spec.ts
index 40d5eafb8..0544f32ea 100644
--- a/e2e/playwright/sketch-tests.spec.ts
+++ b/e2e/playwright/sketch-tests.spec.ts
@@ -113,7 +113,8 @@ test.describe('Sketch tests', { tag: ['@skipWin'] }, () => {
     await page.addInitScript(async () => {
       localStorage.setItem(
         'persistCode',
-        `sketch001 = startSketchOn(XZ)
+        `@settings(defaultLengthUnit = in)
+sketch001 = startSketchOn(XZ)
   |> startProfileAt([2.61, -4.01], %)
   |> xLine(length = 8.73)
   |> tangentialArcTo([8.33, -1.31], %)`
@@ -159,7 +160,10 @@ test.describe('Sketch tests', { tag: ['@skipWin'] }, () => {
       await page.mouse.click(700, 200)
 
       await expect.poll(u.normalisedEditorCode, { timeout: 1000 })
-        .toBe(`sketch002 = startSketchOn(XZ)
+        .toBe(`@settings(defaultLengthUnit = in)
+
+
+sketch002 = startSketchOn(XZ)
 sketch001 = startProfileAt([12.34, -12.34], sketch002)
   |> yLine(length = 12.34)
 
@@ -789,7 +793,8 @@ sketch001 = startProfileAt([12.34, -12.34], sketch002)
       200
     )
 
-    let codeStr = 'sketch001 = startSketchOn(XY)'
+    let codeStr =
+      '@settings(defaultLengthUnit = in)sketch001 = startSketchOn(XY)'
 
     await page.mouse.click(center.x, viewportSize.height * 0.55)
     await expect(u.codeLocator).toHaveText(codeStr)
diff --git a/e2e/playwright/test-utils.ts b/e2e/playwright/test-utils.ts
index f4a36a8fa..6ff241fe3 100644
--- a/e2e/playwright/test-utils.ts
+++ b/e2e/playwright/test-utils.ts
@@ -1007,6 +1007,10 @@ export function executorInputPath(fileName: string): string {
   return path.join('rust', 'kcl-lib', 'e2e', 'executor', 'inputs', fileName)
 }
 
+export function kclSamplesInputPath(samplePathSegments: string[]): string {
+  return path.join('public', 'kcl-samples', ...samplePathSegments)
+}
+
 export async function doAndWaitForImageDiff(
   page: Page,
   fn: () => Promise<unknown>,
diff --git a/e2e/playwright/testing-settings.spec.ts b/e2e/playwright/testing-settings.spec.ts
index b0c856aa1..bcf42ce09 100644
--- a/e2e/playwright/testing-settings.spec.ts
+++ b/e2e/playwright/testing-settings.spec.ts
@@ -8,6 +8,7 @@ import {
   tomlToSettings,
   TEST_COLORS,
   orRunWhenFullSuiteEnabled,
+  kclSamplesInputPath,
 } from './test-utils'
 import { SettingsLevel } from 'lib/settings/settingsTypes'
 import { SETTINGS_FILE_NAME, PROJECT_SETTINGS_FILE_NAME } from 'lib/constants'
@@ -271,7 +272,7 @@ test.describe('Testing settings', () => {
           const bracketDir = join(dir, projectName)
           await fsp.mkdir(bracketDir, { recursive: true })
           await fsp.copyFile(
-            executorInputPath('focusrite_scarlett_mounting_braket.kcl'),
+            kclSamplesInputPath(['flange', 'main.kcl']),
             join(bracketDir, 'main.kcl')
           )
         }