diff --git a/.github/workflows/l4d2-build.yml b/.github/workflows/build.yml
similarity index 57%
rename from .github/workflows/l4d2-build.yml
rename to .github/workflows/build.yml
index 55be436..6b06ae9 100644
--- a/.github/workflows/l4d2-build.yml
+++ b/.github/workflows/build.yml
@@ -1,4 +1,4 @@
-name: l4d2-build
+name: build
 
 on:
   push:
@@ -59,23 +59,6 @@ jobs:
           echo "CC=clang" >> $GITHUB_ENV
           echo "CXX=clang++" >> $GITHUB_ENV
 
-      - name: Add msbuild to PATH (Windows)
-        if: startsWith(runner.os, 'Windows')
-        uses: microsoft/setup-msbuild@v2
-
-      - name: Install (Windows)
-        if: startsWith(runner.os, 'Windows')
-        shell: cmd
-        run: |
-          :: See https://github.com/microsoft/vswhere/wiki/Find-VC
-          for /f "usebackq delims=*" %%i in (`vswhere -latest -property installationPath`) do (
-            call "%%i"\Common7\Tools\vsdevcmd.bat -arch=x86 -host_arch=x64
-          )
-          :: Loop over all environment variables and make them global.
-          for /f "delims== tokens=1,2" %%a in ('set') do (
-            echo>>"%GITHUB_ENV%" %%a=%%b
-          )
-
       - name: Checking out MM:Source
         uses: actions/checkout@v4
         with:
@@ -91,7 +74,14 @@ jobs:
       - name: Setting up ambuild
         run: |
           python -m pip install wheel
-          pip install git+https://github.com/accelerator74/ambuild
+          pip install git+https://github.com/accelerator74/ambuild@nog3
+
+      - name: Checking out hl2sdk-l4d
+        uses: actions/checkout@v4
+        with:
+          repository: alliedmodders/hl2sdk
+          ref: l4d
+          path: hl2sdk-l4d
 
       - name: Checking out hl2sdk-l4d2
         uses: actions/checkout@v4
@@ -105,16 +95,63 @@ jobs:
         with:
           path: src
 
-      - name: Compiling ${{ github.event.repository.name }} files
+      - name: Compiling ${{ github.event.repository.name }}-l4d files
+        shell: bash
         working-directory: src
         run: |
-          mkdir build
-          cd build
+          mkdir build_l4d
+          cd build_l4d
+          python ../configure.py --enable-optimize --sdks="l4d" --mms-path="${{ github.workspace }}/metamod-${{ matrix.mm_version }}"
+          ambuild
+
+      - name: Compiling ${{ github.event.repository.name }}-l4d2 files
+        shell: bash
+        working-directory: src
+        run: |
+          mkdir build_l4d2
+          cd build_l4d2
           python ../configure.py --enable-optimize --sdks="l4d2" --mms-path="${{ github.workspace }}/metamod-${{ matrix.mm_version }}"
           ambuild
 
-      - name: Uploading package
+      - name: Uploading l4d package
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ github.event.repository.name }}-l4d-${{ matrix.os_short }}-${{ env.GITHUB_SHA_SHORT }}
+          path: src/build_l4d/package
+
+      - name: Uploading l4d2 package
         uses: actions/upload-artifact@v4
         with:
           name: ${{ github.event.repository.name }}-l4d2-${{ matrix.os_short }}-${{ env.GITHUB_SHA_SHORT }}
-          path: src/build/package
\ No newline at end of file
+          path: src/build_l4d2/package
+
+  release:
+    name: Release
+    if: startsWith(github.ref, 'refs/tags/')
+    needs: build
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Download artifacts
+        uses: actions/download-artifact@v4
+
+      - name: Package
+        run: |
+          version=`echo $GITHUB_REF | sed "s/refs\/tags\///"`
+          ls -Rall
+          for folder in ${{ github.event.repository.name }}*; do
+            if [ -d "$folder" ]; then
+              echo "Processing folder: $folder"
+              cd $folder
+              tar -czf ../$folder.tar.gz -T <(\ls -1)
+              cd ..
+            fi
+          done
+
+      - name: Release
+        uses: svenstaro/upload-release-action@v2
+        with:
+          repo_token: ${{ secrets.GITHUB_TOKEN }}
+          file: '*.tar.gz'
+          tag: ${{ github.ref }}
+          file_glob: true
diff --git a/.github/workflows/l4d_build.yml b/.github/workflows/l4d_build.yml
deleted file mode 100644
index b0e6508..0000000
--- a/.github/workflows/l4d_build.yml
+++ /dev/null
@@ -1,120 +0,0 @@
-name: l4d-build
-
-on:
-  push:
-    branches:
-      - main
-      - master
-    tags:
-      - '*'
-    paths-ignore:
-      - LICENSE
-      - README.md
-  pull_request:
-    branches:
-      - main
-      - master
-    paths-ignore:
-      - LICENSE
-      - README.md
-  schedule:
-    - cron: '30 03 01 */3 *' # Artifacts expire every 3 months
-
-jobs:
-  build:
-    name: build with mms${{ matrix.mm_version }} on ${{ matrix.os_short }}
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os:
-          - ubuntu-latest
-          - windows-latest
-
-        mm_version:
-          - "master"
-
-        include:
-          - mm_version: "master"
-            mm_branch: "master"
-
-          - os: ubuntu-latest
-            os_short: linux
-
-          - os: windows-latest
-            os_short: win
-
-    steps:
-      - name: Prepare env
-        shell: bash
-        run: |
-          echo "GITHUB_SHA_SHORT=${GITHUB_SHA::7}" >> $GITHUB_ENV
-
-      - name: Install (Linux)
-        if: startsWith(runner.os, 'Linux')
-        run: |
-          sudo dpkg --add-architecture i386
-          sudo apt-get update
-          sudo apt-get install -y clang g++-multilib
-          echo "CC=clang" >> $GITHUB_ENV
-          echo "CXX=clang++" >> $GITHUB_ENV
-
-      - name: Add msbuild to PATH (Windows)
-        if: startsWith(runner.os, 'Windows')
-        uses: microsoft/setup-msbuild@v2
-
-      - name: Install (Windows)
-        if: startsWith(runner.os, 'Windows')
-        shell: cmd
-        run: |
-          :: See https://github.com/microsoft/vswhere/wiki/Find-VC
-          for /f "usebackq delims=*" %%i in (`vswhere -latest -property installationPath`) do (
-            call "%%i"\Common7\Tools\vsdevcmd.bat -arch=x86 -host_arch=x64
-          )
-          :: Loop over all environment variables and make them global.
-          for /f "delims== tokens=1,2" %%a in ('set') do (
-            echo>>"%GITHUB_ENV%" %%a=%%b
-          )
-
-      - name: Checking out MM:Source
-        uses: actions/checkout@v4
-        with:
-          repository: alliedmodders/metamod-source
-          ref: ${{ matrix.mm_branch }}
-          path: metamod-${{ matrix.mm_version }}
-
-      - name: Setting up Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: '3.11'
-
-      - name: Setting up ambuild
-        run: |
-          python -m pip install wheel
-          pip install git+https://github.com/accelerator74/ambuild
-
-      - name: Checking out hl2sdk-l4d
-        uses: actions/checkout@v4
-        with:
-          repository: alliedmodders/hl2sdk
-          ref: l4d
-          path: hl2sdk-l4d
-
-      - name: Checking out own repository
-        uses: actions/checkout@v4
-        with:
-          path: src
-
-      - name: Compiling ${{ github.event.repository.name }} files
-        working-directory: src
-        run: |
-          mkdir build
-          cd build
-          python ../configure.py --enable-optimize --sdks="l4d" --mms-path="${{ github.workspace }}/metamod-${{ matrix.mm_version }}"
-          ambuild
-
-      - name: Uploading package
-        uses: actions/upload-artifact@v4
-        with:
-          name: ${{ github.event.repository.name }}-l4d-${{ matrix.os_short }}-${{ env.GITHUB_SHA_SHORT }}
-          path: src/build/package
\ No newline at end of file
diff --git a/configure.py b/configure.py
index c4ecfcc..d380566 100644
--- a/configure.py
+++ b/configure.py
@@ -14,7 +14,7 @@ builder.options.add_option('--enable-debug', action='store_const', const='1', de
                        help='Enable debugging symbols')
 builder.options.add_option('--enable-optimize', action='store_const', const='1', dest='opt',
                        help='Enable optimization')
-builder.options.add_option('-s', '--sdks', default='all', dest='sdks',
+builder.options.add_option('-s', '--sdks', default='present', dest='sdks',
                        help='Build against specified SDKs; valid args are "all", "present", or '
                             'comma-delimited list of engine names (default: %default)')
 
diff --git a/l4d1_offsets_linux.h b/l4d1_offsets_linux.h
index b5be70b..56f3177 100644
--- a/l4d1_offsets_linux.h
+++ b/l4d1_offsets_linux.h
@@ -3,7 +3,7 @@
 
 const char* engine_dll = "engine.so";
 int slots_offs = 94; // m_numGameSlots (in CGameServer::ExecGameTypeCfg)
-int reserved_offs = 360; // IsReserved() (in CBaseServer::ReplyReservationRequest)
+int reserved_offs = 360; // m_nReservationCookie (in CBaseServer::ReplyReservationRequest)
 int reservation_idx = 60; // CBaseServer::ReplyReservationRequest(netadr_s&, bf_read&) vtable
 int maxhuman_idx = 132; // CTerrorGameRules::GetMaxHumanPlayers vtable
 
diff --git a/l4d1_offsets_win32.h b/l4d1_offsets_win32.h
index b008942..2d061c3 100644
--- a/l4d1_offsets_win32.h
+++ b/l4d1_offsets_win32.h
@@ -3,7 +3,7 @@
 
 int sv_offs = 6; // IServer pointer (in IVEngineServer::CreateFakeClient)
 int slots_offs = 96; // m_numGameSlots (in CGameServer::ExecGameTypeCfg)
-int reserved_offs = 46; // IsReserved() (in CBaseServer::ReplyReservationRequest)
+int reserved_offs = 46; // m_nReservationCookie (in CBaseServer::ReplyReservationRequest)
 int reservation_idx = 59; // CBaseServer::ReplyReservationRequest(netadr_s&, bf_read&) vtable
 int maxhuman_idx = 131; // CTerrorGameRules::GetMaxHumanPlayers vtable
 
diff --git a/l4d2_offsets_linux.h b/l4d2_offsets_linux.h
index 5e17e03..12d0638 100644
--- a/l4d2_offsets_linux.h
+++ b/l4d2_offsets_linux.h
@@ -3,7 +3,7 @@
 
 const char* engine_dll = "engine_srv.so";
 int slots_offs = 95; // m_numGameSlots (in CGameServer::ExecGameTypeCfg)
-int reserved_offs = 364; // IsReserved() (in CBaseServer::ReplyReservationRequest)
+int reserved_offs = 364; // m_nReservationCookie (in CBaseServer::ReplyReservationRequest)
 int reservation_idx = 62; // CBaseServer::ReplyReservationRequest(netadr_s&, bf_read&) vtable
 int maxhuman_idx = 137; // CTerrorGameRules::GetMaxHumanPlayers vtable
 
diff --git a/l4d2_offsets_win32.h b/l4d2_offsets_win32.h
index b18d00b..6a39a65 100644
--- a/l4d2_offsets_win32.h
+++ b/l4d2_offsets_win32.h
@@ -3,7 +3,7 @@
 
 int sv_offs = 8; // IServer pointer (in IVEngineServer::CreateFakeClient)
 int slots_offs = 96; // m_numGameSlots (in CGameServer::ExecGameTypeCfg)
-int reserved_offs = 46; // IsReserved() (in CBaseServer::ReplyReservationRequest)
+int reserved_offs = 46; // m_nReservationCookie (in CBaseServer::ReplyReservationRequest)
 int reservation_idx = 61; // CBaseServer::ReplyReservationRequest(netadr_s&, bf_read&) vtable
 int maxhuman_idx = 136; // CTerrorGameRules::GetMaxHumanPlayers vtable