diff --git a/.github/actions/runner-fallback/action.yml b/.github/actions/runner-fallback/action.yml
new file mode 100644
index 0000000..9b320f2
--- /dev/null
+++ b/.github/actions/runner-fallback/action.yml
@@ -0,0 +1,61 @@
+# actions/runner-fallback/action.yml
+name: "Runner Fallback"
+description: |
+  Chooses a self-hosted runner when one with the required labels is online,
+  otherwise returns a fallback GitHub-hosted label.
+inputs:
+  primary-runner:
+    description: 'Comma-separated label list for the preferred self-hosted runner (e.g. "self-hosted,linux")'
+    required: true
+  fallback-runner:
+    description: 'Comma-separated label list or single label for the fallback (e.g. "ubuntu-latest")'
+    required: true
+  github-token:
+    description: "PAT or GITHUB_TOKEN with `repo` scope"
+    required: true
+
+outputs:
+  use-runner:
+    description: "JSON array of labels you can feed straight into runs-on"
+    value: ${{ steps.pick.outputs.use-runner }}
+
+runs:
+  using: "composite"
+  steps:
+    - name: Check self-hosted fleet
+      id: pick
+      shell: bash
+      env:
+        TOKEN: ${{ inputs.github-token }}
+        PRIMARY: ${{ inputs.primary-runner }}
+        FALLBACK: ${{ inputs.fallback-runner }}
+      run: |
+        # -------- helper -----------
+        to_json_array () {
+          local list="$1"; IFS=',' read -ra L <<<"$list"
+          printf '['; printf '"%s",' "${L[@]}"; printf ']'
+        }
+        # -------- query API ---------
+        repo="${{ github.repository }}"
+        runners=$(curl -s -H "Authorization: Bearer $TOKEN" \
+                        -H "Accept: application/vnd.github+json" \
+                        "https://api.github.com/repos/$repo/actions/runners?per_page=100")
+        # Split wanted labels
+        IFS=',' read -ra WANT <<<"$PRIMARY"
+        online_found=0
+        while read -r row; do
+          labels=$(jq -r '.labels[].name' <<<"$row")
+          ok=1
+          for w in "${WANT[@]}"; do
+            grep -Fxq "$w" <<<"$labels" || { ok=0; break; }
+          done
+          [ "$ok" -eq 1 ] && { online_found=1; break; }
+        done < <(jq -c '.runners[] | select(.status=="online")' <<<"$runners")
+
+        if [ "$online_found" -eq 1 ]; then
+          echo "✅ Self-hosted runner online."
+          echo "use-runner=$(to_json_array "$PRIMARY")" >>"$GITHUB_OUTPUT"
+        else
+          echo "❌ No matching self-hosted runner online - using fallback."
+          echo "use-runner=$(to_json_array "$FALLBACK")" >>"$GITHUB_OUTPUT"
+        fi
diff --git a/.github/runners/runner-arm/Dockerfile b/.github/runners/runner-arm/Dockerfile
new file mode 100644
index 0000000..741114e
--- /dev/null
+++ b/.github/runners/runner-arm/Dockerfile
@@ -0,0 +1,30 @@
+FROM ubuntu:latest
+
+ARG RUNNER_VERSION="2.323.0"
+
+# Prevents installdependencies.sh from prompting the user and blocking the image creation
+ARG DEBIAN_FRONTEND=noninteractive
+
+RUN apt update -y && apt upgrade -y && useradd -m docker
+RUN apt install -y --no-install-recommends \
+    curl jq build-essential libssl-dev libffi-dev python3 python3-venv python3-dev python3-pip \
+    # dot net core dependencies
+    libicu74  libssl3 libkrb5-3 zlib1g libcurl4
+
+
+RUN cd /home/docker && mkdir actions-runner && cd actions-runner \
+    && curl -O -L https://github.com/actions/runner/releases/download/v${RUNNER_VERSION}/actions-runner-linux-arm64-${RUNNER_VERSION}.tar.gz \
+    && tar xzf ./actions-runner-linux-arm64-${RUNNER_VERSION}.tar.gz
+
+RUN chown -R docker ~docker && /home/docker/actions-runner/bin/installdependencies.sh
+
+COPY entrypoint.sh entrypoint.sh
+
+# make the script executable
+RUN chmod +x entrypoint.sh
+
+# since the config and run script for actions are not allowed to be run by root,
+# set the user to "docker" so all subsequent commands are run as the docker user
+USER docker
+
+ENTRYPOINT ["./entrypoint.sh"]
\ No newline at end of file
diff --git a/.github/runner/docker-compose.yml b/.github/runners/runner-arm/docker-compose.yml
similarity index 100%
rename from .github/runner/docker-compose.yml
rename to .github/runners/runner-arm/docker-compose.yml
diff --git a/.github/runner/entrypoint.sh b/.github/runners/runner-arm/entrypoint.sh
similarity index 100%
rename from .github/runner/entrypoint.sh
rename to .github/runners/runner-arm/entrypoint.sh
diff --git a/.github/runner/example.env b/.github/runners/runner-arm/example.env
similarity index 100%
rename from .github/runner/example.env
rename to .github/runners/runner-arm/example.env
diff --git a/.github/runner/start.sh b/.github/runners/runner-arm/start.sh
similarity index 100%
rename from .github/runner/start.sh
rename to .github/runners/runner-arm/start.sh
diff --git a/.github/runner/Dockerfile b/.github/runners/runner-x64/Dockerfile
similarity index 100%
rename from .github/runner/Dockerfile
rename to .github/runners/runner-x64/Dockerfile
diff --git a/.github/runners/runner-x64/docker-compose.yml b/.github/runners/runner-x64/docker-compose.yml
new file mode 100644
index 0000000..3ecee8e
--- /dev/null
+++ b/.github/runners/runner-x64/docker-compose.yml
@@ -0,0 +1,18 @@
+# docker-compose.yml
+
+services:
+  github-runner:
+    build:
+      context: .
+      args:
+        RUNNER_VERSION: 2.323.0
+    # container_name commented to allow for multiple runners
+    # container_name: github-runner
+    env_file:
+      - .env
+    volumes:
+      - runner-work:/home/runner/actions-runner/_work
+    restart: unless-stopped
+
+volumes:
+  runner-work:
diff --git a/.github/runners/runner-x64/entrypoint.sh b/.github/runners/runner-x64/entrypoint.sh
new file mode 100644
index 0000000..97e8609
--- /dev/null
+++ b/.github/runners/runner-x64/entrypoint.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+
+REPOSITORY=$REPO
+ACCESS_TOKEN=$GH_TOKEN
+LABELS=$RUNNER_LABELS
+
+# echo "REPO ${REPOSITORY}"
+# echo "ACCESS_TOKEN ${ACCESS_TOKEN}"
+
+REG_TOKEN=$(curl -X POST -H "Authorization: token ${ACCESS_TOKEN}" -H "Accept: application/vnd.github+json" https://api.github.com/repos/${REPOSITORY}/actions/runners/registration-token | jq .token --raw-output)
+
+cd /home/docker/actions-runner
+
+./config.sh --url https://github.com/${REPOSITORY} --token ${REG_TOKEN} --labels ${LABELS}
+
+cleanup() {
+    echo "Removing runner..."
+    ./config.sh remove --unattended --token ${REG_TOKEN}
+}
+
+trap 'cleanup; exit 130' INT
+trap 'cleanup; exit 143' TERM
+
+./run.sh & wait $!
\ No newline at end of file
diff --git a/.github/runners/runner-x64/example.env b/.github/runners/runner-x64/example.env
new file mode 100644
index 0000000..6ab2dc8
--- /dev/null
+++ b/.github/runners/runner-x64/example.env
@@ -0,0 +1,9 @@
+
+# Repository name
+REPO="Magnus167/rustframe"
+
+# GitHub runner token
+GH_TOKEN="some_token_here"
+
+# Labels for the runner
+RUNNER_LABELS=self-hosted-linux,linux
\ No newline at end of file
diff --git a/.github/runners/runner-x64/start.sh b/.github/runners/runner-x64/start.sh
new file mode 100644
index 0000000..891f4d4
--- /dev/null
+++ b/.github/runners/runner-x64/start.sh
@@ -0,0 +1,4 @@
+
+
+docker compose up -d --build
+# docker compose up -d --build --scale github-runner=2
diff --git a/.github/workflows/docs-and-testcov.yml b/.github/workflows/docs-and-testcov.yml
index 2307ec2..94eab46 100644
--- a/.github/workflows/docs-and-testcov.yml
+++ b/.github/workflows/docs-and-testcov.yml
@@ -17,8 +17,23 @@ permissions:
   pages: write
 
 jobs:
-  docs-and-testcov:
+  pick-runner:
     runs-on: ubuntu-latest
+    outputs:
+      runner: ${{ steps.choose.outputs.use-runner }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - id: choose
+        uses: ./.github/actions/runner-fallback
+        with:
+          primary-runner: "self-hosted,ubuntu-latest"
+          fallback-runner: "ubuntu-latest"
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+
+  docs-and-testcov:
+    needs: pick-runner
+    runs-on: ${{ fromJson(needs.pick-runner.outputs.runner) }}
 
     steps:
       - uses: actions/checkout@v4
@@ -28,10 +43,10 @@ jobs:
         with:
           toolchain: stable
           override: true
-    
+
       - name: Build documentation
         run: cargo doc --no-deps --release
-  
+
       - name: Prepare documentation for Pages
         run: |
 
@@ -45,28 +60,26 @@ jobs:
         run: |
           mkdir -p testcov
           cargo tarpaulin --engine llvm --out Html --out Json
-        
+
       - name: Check for tarpaulin-report.html
         run: |
           if [ ! -f tarpaulin-report.html ]; then
             echo "tarpaulin-report.html not found!"
             exit 1
           fi
-      
+
       - name: Export tarpaulin coverage badge JSON
+        # extract raw coverage and round to 2 decimal places
         run: |
-            # extract raw coverage
-            coverage=$(jq '.coverage' tarpaulin-report.json)
-            # round to 2 decimal places
-            formatted=$(printf "%.2f" "$coverage")
-            # build the badge JSON using the pre-formatted string
-            jq --arg message "$formatted" \
-              '{schemaVersion:1,
-                label:"tarpaulin-report",
-                message:$message,
-                color:"blue"}' \
-              tarpaulin-report.json \
-            > tarpaulin-badge.json
+          coverage=$(jq '.coverage' tarpaulin-report.json)
+          formatted=$(printf "%.2f" "$coverage")
+          jq --arg message "$formatted" \
+            '{schemaVersion:1,
+              label:"tarpaulin-report",
+              message:$message,
+              color:"blue"}' \
+            tarpaulin-report.json \
+          > tarpaulin-badge.json
 
       - name: Save last commit date JSON
         run: |
@@ -78,7 +91,7 @@ jobs:
               color:"blue"}' \
             <(echo '{}') \
           > last-commit-date.json
-  
+
       - name: Copy files to output directory
         run: |
           mkdir output
diff --git a/.github/workflows/run-unit-tests.yml b/.github/workflows/run-unit-tests.yml
index 2811fca..c6e2f91 100644
--- a/.github/workflows/run-unit-tests.yml
+++ b/.github/workflows/run-unit-tests.yml
@@ -11,10 +11,24 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  pick-runner:
+    runs-on: ubuntu-latest
+    outputs:
+      runner: ${{ steps.choose.outputs.use-runner }}
+    steps:
+      - uses: actions/checkout@v4
+      - id: choose
+        uses: ./.github/actions/runner-fallback
+        with:
+          primary-runner: "self-hosted,ubuntu-latest"
+          fallback-runner: "ubuntu-latest"
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+
   run-unit-tests:
+    needs: pick-runner
     if: github.event.pull_request.draft == false
     name: run-unit-tests
-    runs-on: ubuntu-latest
+    runs-on: ${{ fromJson(needs.pick-runner.outputs.runner) }}
     env:
       CARGO_TERM_COLOR: always
 
@@ -24,12 +38,16 @@ jobs:
         run: rustup update stable
       - name: Install cargo-llvm-cov
         uses: taiki-e/install-action@cargo-llvm-cov
-      - name: Generate code coverage
-        run: cargo llvm-cov --all-features --workspace --lcov --output-path lcov.info
-      - name: Run doc-tests
+
+      - name: Run doctests
         run: cargo test --doc --all-features --workspace --release
+
+      - name: Run unit tests with code coverage
+        run: cargo llvm-cov --all-features --release --workspace --lcov --output-path lcov.info
+
       - name: Test docs generation
         run: cargo doc --no-deps --release
+
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v3
         with: