diff --git a/flake.nix b/flake.nix
index f9082f7..406061a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -104,6 +104,19 @@
           ./hosts/franz
         ];
       };
+      # build with nix build .#nixosConfigurations.eustachius.config.system.build.sdImage
+      eustachius = nixpkgs.lib.nixosSystem {
+        system = "aarch64-linux";
+        modules = [
+          "${nixpkgs}/nixos/modules/installer/sd-card/sd-image-aarch64-installer.nix"
+          ./hosts/eustachius
+
+          # extra config for sdImage generator
+          {
+            sdImage.compressImage = false;
+          }
+        ];
+      };
     };
 
     # Standalone home-manager configuration entrypoint
diff --git a/hosts/adalbert/default.nix b/hosts/adalbert/default.nix
index 77ba8fb..73ee7ac 100644
--- a/hosts/adalbert/default.nix
+++ b/hosts/adalbert/default.nix
@@ -73,6 +73,10 @@
   # Force disable Nvidia PRIME, needed by nix-hardware
   hardware.nvidia.prime.offload.enable = false;
 
+  boot.binfmt.emulatedSystems = [
+    "aarch64-linux"
+  ];
+
   programs = {
     adb.enable = true;
     dconf.enable = true;
diff --git a/hosts/eustachius/default.nix b/hosts/eustachius/default.nix
new file mode 100644
index 0000000..ad5eda3
--- /dev/null
+++ b/hosts/eustachius/default.nix
@@ -0,0 +1,146 @@
+{
+  pkgs,
+  lib,
+  ...
+}: {
+  imports = [
+  ];
+
+  # NixOS wants to enable GRUB by default
+  boot.loader.grub.enable = false;
+  # Enables the generation of /boot/extlinux/extlinux.conf
+  boot.loader.generic-extlinux-compatible.enable = true;
+
+  # !!! Set to specific linux kernel version
+  boot.kernelPackages = pkgs.linuxPackages;
+
+  # Disable ZFS on kernel 6
+  boot.supportedFilesystems = lib.mkForce [
+    "vfat"
+    "xfs"
+    "cifs"
+    "ntfs"
+  ];
+
+  # !!! Needed for the virtual console to work on the RPi 3, as the default of 16M doesn't seem to be enough.
+  # If X.org behaves weirdly (I only saw the cursor) then try increasing this to 256M.
+  # On a Raspberry Pi 4 with 4 GB, you should either disable this parameter or increase to at least 64M if you want the USB ports to work.
+  boot.kernelParams = ["cma=256M"];
+
+  # File systems configuration for using the installer's partition layout
+  fileSystems = {
+    # Prior to 19.09, the boot partition was hosted on the smaller first partition
+    # Starting with 19.09, the /boot folder is on the main bigger partition.
+    # The following is to be used only with older images.
+    /*
+    "/boot" = {
+    device = "/dev/disk/by-label/NIXOS_BOOT";
+    fsType = "vfat";
+    };
+    */
+    "/" = {
+      device = "/dev/disk/by-label/NIXOS_SD";
+      fsType = "ext4";
+    };
+  };
+
+  # !!! Adding a swap file is optional, but strongly recommended!
+  swapDevices = [
+    {
+      device = "/swapfile";
+      size = 1024;
+    }
+  ];
+
+  # systemPackages
+  environment.systemPackages = with pkgs; [
+    neovim
+    curl
+    wget
+    bind
+    iptables
+    python3
+    nodejs
+    docker-compose
+  ];
+
+  services.openssh = {
+    enable = true;
+    settings.PermitRootLogin = "yes";
+  };
+
+  services.restic.server.enable = true;
+
+  services.tailscale = {
+    enable = true;
+    useRoutingFeatures = "server";
+  };
+
+  # # Some sample service.
+  # # Use dnsmasq as internal LAN DNS resolver.
+  # services.dnsmasq = {
+  #   enable = false;
+  #   settings.servers = ["8.8.8.8" "8.8.4.4" "1.1.1.1"];
+  #   settings.extraConfig = ''
+  #     address=/fenrir.test/192.168.100.6
+  #     address=/recalune.test/192.168.100.7
+  #     address=/eth.nixpi.test/192.168.100.3
+  #     address=/wlan.nixpi.test/192.168.100.4
+  #   '';
+  # };
+
+  virtualisation.docker.enable = true;
+
+  networking.firewall.enable = false;
+
+  # Networking
+  networking = {
+    # useDHCP = true;
+    interfaces.wlan0 = {
+      useDHCP = false;
+      ipv4.addresses = [
+        {
+          # I used static IP over WLAN because I want to use it as local DNS resolver
+          address = "192.168.1.4";
+          prefixLength = 24;
+        }
+      ];
+    };
+    interfaces.eth0 = {
+      useDHCP = true;
+    };
+  };
+
+  # forwarding
+  boot.kernel.sysctl = {
+    "net.ipv4.conf.all.forwarding" = true;
+    "net.ipv6.conf.all.forwarding" = true;
+    "net.ipv4.tcp_ecn" = true;
+  };
+
+  # put your own configuration here, for example ssh keys:
+  users.mutableUsers = true;
+  users.groups = {
+    nixos = {
+      gid = 1000;
+      name = "ghoscht";
+    };
+  };
+  users.users = {
+    nixos = {
+      uid = 1000;
+      home = "/home/nixos";
+      name = "ghoscht";
+      group = "ghoscht";
+      extraGroups = ["wheel" "docker"];
+    };
+  };
+  users.users.root.openssh.authorizedKeys.keys = [
+    #Desktop
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJd6Gut34abkwlZ4tZVBO4Qt7CkIpPm/Z8R6JCisjnYy openpgp:0xBD0CFCA0"
+
+    #Convertible
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFlRsnLqm6Ap3yKEEhtFiWavo72df/X5Il1ZCmENUqev openpgp:0xDE189CA5"
+  ];
+  system.stateVersion = "23.11";
+}
diff --git a/hosts/franz/arion/headscale/default.nix b/hosts/franz/arion/headscale/default.nix
index d1be53e..2b6b391 100644
--- a/hosts/franz/arion/headscale/default.nix
+++ b/hosts/franz/arion/headscale/default.nix
@@ -2,8 +2,10 @@
   vars = import ../../../../vars.nix;
 in {
   # Tailscale client for exit node/routes
-  services.tailscale.enable = true;
-  services.tailscale.useRoutingFeatures = "server";
+  services.tailscale = {
+    enable = true;
+    useRoutingFeatures = "server";
+  };
 
   virtualisation.arion = {
     projects.headscale.settings = {