diff --git a/.github/workflows/common.yml b/.github/workflows/common.yml
index e73de21d..25f5d004 100644
--- a/.github/workflows/common.yml
+++ b/.github/workflows/common.yml
@@ -95,70 +95,70 @@ jobs:
       matrix: ${{ env.matrix }}
       jdk_build: ${{ env.JDK_BUILD }}
       jre_version: ${{ env.JRE_DEFAULT }}
-#  scale-runners-up:
-#    runs-on: ubuntu-latest
-#    needs:
-#      - parameters
-#    concurrency:
-#      group: stream-apps-gh-runners
-#      cancel-in-progress: false
-#    steps:
-#      - name: 'Configure: checkout stream-applications'
-#        uses: actions/checkout@v3
-#        with:
-#          ref: 'main'
-#      - name: 'Configure: checkout stream-applications'
-#        uses: actions/checkout@v3
-#        with:
-#          ref: 'main'
-#      - name: Ensure scripts are executable
-#        shell: bash
-#        run: find . -type f -name "*.sh" -exec chmod a+x '{}' \;
-#      - name: 'Configure: Configure provider for stream-apps-gh-runners'
-#        id: 'configure-runner-type'
-#        shell: bash
-#        run: |
-#          RUNNER_TYPE=$(./scripts/determine-provider.sh stream-apps-gh-runners)
-#          echo "RUNNER_TYPE=$RUNNER_TYPE"
-#          echo "RUNNER_TYPE=$RUNNER_TYPE" >> $GITHUB_ENV
-#        outputs:
-#          runner-type: '${{ env.RUNNER_TYPE }}'
-#      - name: 'Install: gcloud cli'
-#        if: ${{ env.RUNNER_TYPE == 'gke' }}
-#        uses: ./.github/actions/install-gcloud
-#      - name: 'Action: gcloud auth'
-#        if: ${{ env.RUNNER_TYPE == 'gke' }}
-#        id: auth_gcloud
-#        uses: 'google-github-actions/auth@v0'
-#        with:
-#          create_credentials_file: true
-#          credentials_json: ${{ secrets.GCP_CRED_JSON }}
-#      - name: 'Configure: Install TMC'
-#        if: ${{ env.RUNNER_TYPE == 'tmc' }}
-#        uses: ./.github/actions/install-tmc
-#      - name: 'Action: Login to TMC'
-#        if: ${{ env.RUNNER_TYPE == 'tmc' }}
-#        uses: ./.github/actions/auth-tmc
-#        with:
-#          tmc_api_token: ${{ secrets.TMC_API_TOKEN }}
-#          fail_on_error: false
-#      - name: 'Install: Groovy'
-#        uses: ./.github/actions/install-groovy
-#        with:
-#          version: 4.0.4
-#      - name: 'Action: Scale Runners Up by ${{ needs.parameters.outputs.max_parallel }}'
-#        uses: ./.github/actions/scale-runners-up
-#        timeout-minutes: 45
-#        with:
-#          verbose: ${{ inputs.verbose }}
-#          max_parallel: ${{ toJson(needs.parameters.outputs.max_parallel) }}
-#          GH_ARC_APP_ID: ${{ secrets.GH_ARC_APP_ID }}
-#          GH_ARC_INSTALLATION_ID: ${{ secrets.GH_ARC_INSTALLATION_ID }}
-#          GH_ARC_PRIVATE_KEY: ${{ secrets.GH_ARC_PRIVATE_KEY }}
-#          GH_ARC_PAT: ${{ secrets.GH_ARC_PAT }}
-  core:
+  scale-runners-up:
     runs-on: ubuntu-latest
-#    runs-on: 'stream-ci-large'
+    needs:
+      - parameters
+    concurrency:
+      group: stream-apps-gh-runners
+      cancel-in-progress: false
+    steps:
+      - name: 'Configure: checkout stream-applications'
+        uses: actions/checkout@v3
+        with:
+          ref: 'main'
+      - name: 'Configure: checkout stream-applications'
+        uses: actions/checkout@v3
+        with:
+          ref: 'main'
+      - name: Ensure scripts are executable
+        shell: bash
+        run: find . -type f -name "*.sh" -exec chmod a+x '{}' \;
+      - name: 'Configure: Configure provider for stream-apps-gh-runners'
+        id: 'configure-runner-type'
+        shell: bash
+        run: |
+          RUNNER_TYPE=$(./scripts/determine-provider.sh stream-apps-gh-runners)
+          echo "RUNNER_TYPE=$RUNNER_TYPE"
+          echo "RUNNER_TYPE=$RUNNER_TYPE" >> $GITHUB_ENV
+        outputs:
+          runner-type: '${{ env.RUNNER_TYPE }}'
+      - name: 'Install: gcloud cli'
+        if: ${{ env.RUNNER_TYPE == 'gke' }}
+        uses: ./.github/actions/install-gcloud
+      - name: 'Action: gcloud auth'
+        if: ${{ env.RUNNER_TYPE == 'gke' }}
+        id: auth_gcloud
+        uses: 'google-github-actions/auth@v0'
+        with:
+          create_credentials_file: true
+          credentials_json: ${{ secrets.GCP_CRED_JSON }}
+      - name: 'Configure: Install TMC'
+        if: ${{ env.RUNNER_TYPE == 'tmc' }}
+        uses: ./.github/actions/install-tmc
+      - name: 'Action: Login to TMC'
+        if: ${{ env.RUNNER_TYPE == 'tmc' }}
+        uses: ./.github/actions/auth-tmc
+        with:
+          tmc_api_token: ${{ secrets.TMC_API_TOKEN }}
+          fail_on_error: false
+      - name: 'Install: Groovy'
+        uses: ./.github/actions/install-groovy
+        with:
+          version: 4.0.4
+      - name: 'Action: Scale Runners Up by ${{ needs.parameters.outputs.max_parallel }}'
+        uses: ./.github/actions/scale-runners-up
+        timeout-minutes: 45
+        with:
+          verbose: ${{ inputs.verbose }}
+          max_parallel: ${{ toJson(needs.parameters.outputs.max_parallel) }}
+          GH_ARC_APP_ID: ${{ secrets.GH_ARC_APP_ID }}
+          GH_ARC_INSTALLATION_ID: ${{ secrets.GH_ARC_INSTALLATION_ID }}
+          GH_ARC_PRIVATE_KEY: ${{ secrets.GH_ARC_PRIVATE_KEY }}
+          GH_ARC_PAT: ${{ secrets.GH_ARC_PAT }}
+  core:
+#    runs-on: ubuntu-latest
+    runs-on: 'stream-ci-large'
     needs:
       - parameters
     steps:
@@ -218,14 +218,14 @@ jobs:
     needs:
       - core
       - parameters
-#      - scale-runners-up
+      - scale-runners-up
     strategy:
       fail-fast: false
       max-parallel: 4
       matrix:
         app: ${{ fromJson(needs.parameters.outputs.processors) }}
-    runs-on: 'ubuntu-latest'
-#    runs-on: 'stream-ci'
+#    runs-on: 'ubuntu-latest'
+    runs-on: 'stream-ci'
     steps:
       - name: 'Configure: checkout stream-applications'
         uses: actions/checkout@v3
@@ -280,14 +280,14 @@ jobs:
     needs:
       - core
       - parameters
-#      - scale-runners-up
+      - scale-runners-up
     strategy:
       max-parallel: 4
       fail-fast: false
       matrix:
         app: ${{ fromJson(needs.parameters.outputs.sinks) }}
-    runs-on: 'ubuntu-latest'
-#    runs-on: 'stream-ci'
+#    runs-on: 'ubuntu-latest'
+    runs-on: 'stream-ci'
     steps:
       - name: 'Configure: checkout stream-applications'
         uses: actions/checkout@v3
@@ -342,15 +342,15 @@ jobs:
     needs:
       - core
       - parameters
-#      - scale-runners-up
+      - scale-runners-up
     strategy:
       max-parallel: 4
       fail-fast: false
       # will be removed when private runners are used.
       matrix:
         app: ${{ fromJson(needs.parameters.outputs.sources) }}
-    runs-on: 'ubuntu-latest'
-#    runs-on: 'stream-ci'
+#    runs-on: 'ubuntu-latest'
+    runs-on: 'stream-ci'
     steps:
       - name: 'Configure: checkout stream-applications'
         uses: actions/checkout@v3
@@ -400,52 +400,52 @@ jobs:
           DOCKER_HUB_PASSWORD: ${{ secrets.DOCKER_HUB_PASSWORD }}
           DEFAULT_JDK: ${{ needs.parameters.outputs.jre_version }}
         run: ./publish-app.sh "stream-applications" "applications/source/${{ matrix.app }}"
-#  scale-runners-down:
-#    if: ${{ success() }}
-#    runs-on: ubuntu-latest
-#    needs:
-#      - parameters
-#      - processors
-#      - sinks
-#      - sources
-#    concurrency:
-#      group: stream-apps-gh-runners
-#      cancel-in-progress: false
-#    steps:
-#      - name: 'Configure: checkout stream-applications'
-#        uses: actions/checkout@v3
-#        with:
-#          ref: 'main'
-#      - name: 'Action: Ensure scripts are executable'
-#        shell: bash
-#        run: find . -type f -name "*.sh" -exec chmod a+x '{}' \;
-#      - name: 'Configure: Runners Cluster provider'
-#        shell: bash
-#        run: |
-#          RUNNER_TYPE=$(./scripts/determine-provider.sh stream-apps-gh-runners)
-#          if [ "$RUNNER_TYPE" != "gke" ]; then
-#            RUNNER_TYPE=tmc
-#          fi
-#          echo "RUNNER_TYPE=$RUNNER_TYPE" >> $GITHUB_ENV
-#      - name: 'Install: gcloud cli'
-#        if: ${{ env.RUNNER_TYPE == 'gke' }}
-#        uses: ./.github/actions/install-gcloud
-#      - name: 'Action: gcloud auth'
-#        if: ${{ env.RUNNER_TYPE == 'gke' }}
-#        id: auth_gcloud
-#        uses: 'google-github-actions/auth@v0'
-#        with:
-#          create_credentials_file: true
-#          credentials_json: ${{ secrets.GCP_CRED_JSON }}
-#      - name: 'Configure: Install TMC'
-#        if: ${{ env.RUNNER_TYPE == 'tmc' }}
-#        uses: ./.github/actions/install-tmc
-#      - name: 'Action: Login to TMC'
-#        if: ${{ env.RUNNER_TYPE == 'tmc' }}
-#        uses: ./.github/actions/auth-tmc
-#        with:
-#          tmc_api_token: ${{ secrets.TMC_API_TOKEN }}
-#      - name: 'Action: Decrease runners with ${{ needs.parameters.outputs.max_parallel }}'
-#        uses: ./.github/actions/decrease-runners
-#        with:
-#          dec: ${{ needs.parameters.outputs.max_parallel }}
+  scale-runners-down:
+    if: ${{ success() }}
+    runs-on: ubuntu-latest
+    needs:
+      - parameters
+      - processors
+      - sinks
+      - sources
+    concurrency:
+      group: stream-apps-gh-runners
+      cancel-in-progress: false
+    steps:
+      - name: 'Configure: checkout stream-applications'
+        uses: actions/checkout@v3
+        with:
+          ref: 'main'
+      - name: 'Action: Ensure scripts are executable'
+        shell: bash
+        run: find . -type f -name "*.sh" -exec chmod a+x '{}' \;
+      - name: 'Configure: Runners Cluster provider'
+        shell: bash
+        run: |
+          RUNNER_TYPE=$(./scripts/determine-provider.sh stream-apps-gh-runners)
+          if [ "$RUNNER_TYPE" != "gke" ]; then
+            RUNNER_TYPE=tmc
+          fi
+          echo "RUNNER_TYPE=$RUNNER_TYPE" >> $GITHUB_ENV
+      - name: 'Install: gcloud cli'
+        if: ${{ env.RUNNER_TYPE == 'gke' }}
+        uses: ./.github/actions/install-gcloud
+      - name: 'Action: gcloud auth'
+        if: ${{ env.RUNNER_TYPE == 'gke' }}
+        id: auth_gcloud
+        uses: 'google-github-actions/auth@v0'
+        with:
+          create_credentials_file: true
+          credentials_json: ${{ secrets.GCP_CRED_JSON }}
+      - name: 'Configure: Install TMC'
+        if: ${{ env.RUNNER_TYPE == 'tmc' }}
+        uses: ./.github/actions/install-tmc
+      - name: 'Action: Login to TMC'
+        if: ${{ env.RUNNER_TYPE == 'tmc' }}
+        uses: ./.github/actions/auth-tmc
+        with:
+          tmc_api_token: ${{ secrets.TMC_API_TOKEN }}
+      - name: 'Action: Decrease runners with ${{ needs.parameters.outputs.max_parallel }}'
+        uses: ./.github/actions/decrease-runners
+        with:
+          dec: ${{ needs.parameters.outputs.max_parallel }}
diff --git a/scripts/decrease-runners.sh b/scripts/decrease-runners.sh
index 21f0f504..f58c9b03 100755
--- a/scripts/decrease-runners.sh
+++ b/scripts/decrease-runners.sh
@@ -20,12 +20,15 @@ if [ "$1" = "" ]; then
   echo "Expected number to decrease"
   exit 1
 fi
+CLUSTER_NAME=stream-apps-gh-runners
 echo "Checking stream-apps-gh-runners"
 DEC=$1
 MIN_RUNNERS=$2
 
-SCALING=$(jq '.stream-apps-gh-runners.runner_scaling' $PARENT/config/defaults.json | sed 's/\"//g')
-cp $SCDIR/k8s/runners-stream-ci-${SCALING}-template.yaml runners-stream-ci-change.yaml
+
+SCALE_MIN=$($SCDIR/determine-default.sh $CLUSTER_NAME "scale_down")
+SCALING=$($SCDIR/determine-default.sh $CLUSTER_NAME "runner_scaling")
+
 if [ "$SCALING" == "auto" ]; then
   MAX_RUNNERS=$(max_replicas)
   MAX_RUNNERS=$((MAX_RUNNERS - DEC))
@@ -33,11 +36,11 @@ if [ "$SCALING" == "auto" ]; then
   if [ "$MIN_RUNNERS" == "" ]; then
     MIN_RUNNERS=$((CURRENT - DEC))
   fi
-  if ((MAX_RUNNERS < 1)); then
-    MAX_RUNNERS=1
+  if ((MAX_RUNNERS < SCALE_MIN)); then
+    MAX_RUNNERS=SCALE_MIN
   fi
-  if ((MIN_RUNNERS < 1)); then
-    MIN_RUNNERS=1
+  if ((MIN_RUNNERS < SCALE_MIN)); then
+    MIN_RUNNERS=SCALE_MIN
   fi
 else
   CURRENT=$(count_runners)
@@ -50,20 +53,31 @@ if [ "$MIN_RUNNERS" != "" ]; then
     TARGET=$MIN_RUNNERS
   fi
 fi
-if ((TARGET < 1)); then
-  TARGET=1
+if ((TARGET < SCALE_MIN)); then
+  TARGET=SCALE_MIN
 fi
-OS=$(uname)
-OS="${OS//./L&}"
-ARCH=$(uname -i)
+if [ "$OS" = "" ]; then
+  OS=$(uname)
+fi
+OS="${OS//./L&}" #lowercase
+if [ "$ARCH" = "" ]; then
+  ARCH=$(uname -i)
+fi
+ARCH="${ARCH//./L&}" #lowercase
 case $ARCH in
 "x86_64")
   ARCH=amd64
   ;;
+"arm" | "arm64" | "armv8" | "aarch64")
+  ARCH=arm64
+  ;;
 *)
   echo "Architecture:$ARCH may not be supported by summerwind/actions-runner"
   ;;
 esac
+# the specific template
+cp $SCDIR/k8s/runners-stream-ci-${SCALING}-template.yaml runners-stream-ci-change.yaml
+
 IMAGE_SHA=$(wget -q -O- https://hub.docker.com/v2/repositories/summerwind/actions-runner/tags | jq --arg os $OS --arg arch $ARCH '.results | map(select(.name="latest")) | .[0].images | map(select(.os==$os and .architecture==$arch)) | .[0].digest' | sed 's/\"//g')
 if [ "$IMAGE_SHA" == "" ]; then
   IMAGE_SHA="latest"